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Sloinnte na hÉireann

The map of Irish surnames

Every surname on the atlas, placed on the county it came out of. Click a county to see whose names belong there — or find your own and learn which patch of ground it was made on.

Carlow — 6 surnames Cavan — 25 surnames Cork — 94 surnames Donegal — 50 surnames Dublin — 12 surnames Clare — 60 surnames Galway — 81 surnames Kerry — 58 surnames Kildare — 8 surnames Kilkenny — 29 surnames Laois — 26 surnames Leitrim — 16 surnames Limerick — 63 surnames Longford — 11 surnames Louth — 12 surnames Mayo — 64 surnames Meath — 20 surnames Monaghan — 19 surnames Offaly — 24 surnames Roscommon — 53 surnames Sligo — 36 surnames Tipperary — 53 surnames Waterford — 16 surnames Westmeath — 18 surnames Wexford — 28 surnames Wicklow — 9 surnames Antrim — 29 surnames Armagh — 24 surnames Down — 29 surnames Fermanagh — 27 surnames Derry / Londonderry — 20 surnames Tyrone — 30 surnames
Fewer names More

Shading is by how many surnames on this atlas name that county as a homeland — a measure of what we have written up so far, not a census. Cork and Galway are large and well recorded; Carlow is small. Suggest a name we're missing →

Ulster

Donegal Dún na nGall — 50 names

Begley Ó Beaglaoich descendant of the little hero, from beaglaoch Boyce Ó Buadhaigh descendant of Buadhach, ‘victorious’; or Norman ‘de Bois’, of the wood Boyle Ó Baoighill descendant of Baoigheall, 'vain pledge' Bradley Ó Brolcháin descendant of Brolachán, a diminutive of Brólach Breslin Ó Breisleáin descendant of Breasal — the meaning of the personal name is not securely known Brogan Ó Brógáin descendant of Brógán — probably from bróg, 'shoe' Cafferty Mac Eachmharcaigh son of Eachmharcach, 'horse-rider' Cannon Mac Canann son of Cana, 'a whelp' or wolf cub Carolan Ó Cearbhalláin descendant of Cearbhallán, 'little Cearbhall' Clarke Ó Cléirigh descendant of the cleric — possibly Europe's oldest surname (916 AD) Curran Ó Corráin descendant of Corrán Doherty Ó Dochartaigh descendant of Dochartach, 'the hurtful' Duffy Ó Dubhthaigh descendant of Dubhthach, 'the dark one' Dwyer Ó Dubhuidhir descendant of Dubhodhar, ‘black Odhar’ Early Ó Maolmhochóirghe descendant of Maolmhocheirghe, ‘chief of early rising’ Friel Ó Firghil descendant of Fearghal, 'super-valour' Gallagher Ó Gallchobhair descendant of Gallchobhar, 'foreign help' Gill Mac an Ghoill son of the foreigner Gilligan Mac Giollagáin son of Giollagán — 'youth, lad' Gormley Ó Goirmleaghaigh descendant of Goirmshleaghach, 'blue-spearman' Harkin Ó hEarcáin descendant of Earcán, a diminutive of earc, ‘red, speckled’ Hegarty Ó hÁgartaigh descendant of Fágartach Kerrigan Ó Ciaragáin descendant of Ciaragán — from ciar, black Laverty Ó Laithbheartaigh descendant of Flaithbheartach Magee Mag Aoidh son of Aodh, 'fire' McBride Mac Giolla Bhríde son of the servant of St Brigid McDaid Mac Daibhéid son of Davet, a diminutive of David McFadden Mac Pháidín son of Páidín, 'little Patrick' McGinley Mag Fhionnghaile son of Fionnghal, ‘fair valour’ McGoldrick Mag Ualghairg son of Ualgharg, ‘proud-fierce’ McGonigle Mag Congail a variant of Mac Congail; Woulfe gives no meaning here McLoughlin Mac Lochlainn son of Lochlann, 'the Norse-lander' McNelis Mac Niallghuis son of Niallghus, 'champion-choice' McNulty Mac an Ultaigh son of the Ulsterman Mulhern Ó Maoilchiaráin descendant of the servant of St Ciarán Mullarkey Ó Maoilearca descendant of the servant of St Earc Mulligan Ó Maolagáin descendant of Maolagán, 'the little tonsured one' Murray Ó Muireadhaigh / Mac Muireadhaigh descendant of Muireadhach, 'seafarer / lord' O'Donnell Ó Domhnaill descendant of Domhnall, 'world-ruler' Quigley Ó Coigligh descendant of Coigleach Rafferty Ó Raithbheartaigh a corruption of Ó Robhartaigh Rigney Ó Raigne a variant of Ó Raighne; Woulfe gives no meaning here Seery Ó Saoraidhe a later form of Ó Síoghradha, descendant of Síoghraidh, the Norse Sigefrith Sharkey Ó Searcaigh descendant of Searcach, 'loving' Shiel Ó Siadhail descendant of Siadhal Sweeney Mac Suibhne son of Suibhne, 'well-going' Tierney Ó Tighearnaigh descendant of Tighearnach, 'lordly' Toner Ó Tomhrair descendant of Tomhrar — a Norse personal name Ward Mac an Bhaird son of the bard Watters Mac Uaitéir / Ó hUisce / Ó Fuaruisce 'son of Walter' (Mac Uaitéir) — or, for the Gaelic septs, names built on 'uisce', water: 'descendant of the water' (Ó hUisce), 'cold water' (Ó Fuaruisce)

Tyrone Tír Eoghain — 30 names

Bradley Ó Brolcháin descendant of Brolachán, a diminutive of Brólach Campbell Mac Cathmhaoil (adopted) cam beul, 'crooked mouth' Carolan Ó Cearbhalláin descendant of Cearbhallán, 'little Cearbhall' Conlan Ó Conalláin / Ó Caoindealbháin descendant of Conallán — a diminutive of Conall Cooney Ó Cuana descendant of Cuana Devlin Ó Doibhilin descendant of Doibhilean Donnelly Ó Donnghaile descendant of Donnghal, 'brown valour' Garrahy Mag Fhearadhaigh son of Fearadhach, 'manly' Gilsenan Mac Giolla Seanáin son of the servant of St Senan Gormley Ó Goirmleaghaigh descendant of Goirmshleaghach, 'blue-spearman' Hamill Ó hÁdhmaill descendant of Ádhmall, 'quick, ready, active' Henry Ó hInneirghe descendant of Inneirghe, ‘the rising, early riser’; or Mac Éinrí, son of Henry Hughes Mac Aodha / Ó hAodha son (or descendant) of Aodh, 'fire' Laverty Ó Laithbheartaigh descendant of Flaithbheartach Loughran Ó Luchaireáin descendant of Luchaireán, 'bright, glittering' Lunney Ó Luinigh descendant of Luineach Martin Mac Giolla Mháirtín / Máirtín devotee of St Martin McGale Mac Cathail / Mac Cathmhaoil son of Cathal, 'battle-mighty' — or of Cathmhaol, 'battle-chief'; the authorities differ McKenna Mac Cionaoith son of Cionaoth McNally Mac Con Allaidh son of Cú Allaidh, 'the wild hound' — the wolf Mulgrew Ó Maolchraoibhe descendant of Maolchraoibhe, 'chief of Craobh' O'Hagan Ó hAodhagáin descendant of Aodhagán, a diminutive of Aodh, 'fire' O'Neill Ó Néill descendant of Niall (Glúndub) Quinn Ó Cuinn descendant of Conn, 'chief' Rafferty Ó Raithbheartaigh a corruption of Ó Robhartaigh Sharkey Ó Searcaigh descendant of Searcach, 'loving' Stewart Stíobhard steward of the royal household Taggart Mac an tSagairt son of the priest Traynor Mac Thréinfhir son of Tréanfhear, 'champion' — literally 'strong man' Wilson — son of Will

Antrim Aontroim — 29 names

Adams Mac Ádhaimh son of Adam Agnew Ó Gnímh descendant of Gníomh, 'action' Beattie Biadhtach (source) from Bartholomew — or Irish biadhtach, 'public hospitaller' Bell — at the bell, or 'the handsome' (bel) Campbell Mac Cathmhaoil (adopted) cam beul, 'crooked mouth' Craig — Scots for 'crag, rock' Diamond Ó Diamáin descendant of Diamán, more correctly Díomán, a diminutive of the personal name Díoma Ferguson Mac Fearghusa son of Fearghus, 'man-strength' Flynn Ó Floinn descendant of Flann, 'ruddy' Garrahy Mag Fhearadhaigh son of Fearadhach, 'manly' Gilligan Mac Giollagáin son of Giollagán — 'youth, lad' Graham — from Grantham, Lincolnshire — 'gravelly homestead' Jenkins — (Welsh / Cornish name) 'little John' — Jenkin, a pet-form of John with the '-kin' ending Johnston Mac Seáin (sometimes) John's town Laverty Ó Laithbheartaigh descendant of Flaithbheartach Magee Mag Aoidh son of Aodh, 'fire' McAllister Mac Alastair son of Alastar, a Gaelic form of Alexander McConnell Mac Conaill son of Conall — 'hound' and 'valour'; in Ulster also from Mac Dhòmhnaill McDonnell Mac Dónaill son of Dónall McKeown Mac Eoin son of Eoin or Eoghan — John, or the older Irish Eoghan Mitchell Mistéil from Michael Morrison Mac Muiris / Ó Muirgheasáin son of Maurice / descendant of Muirgheasán Mulholland Ó Maolchalann descendant of Maolchalann, 'chief of the calends' O'Hara Ó hEaghra descendant of Eaghra of Luighne O'Neill Ó Néill descendant of Niall (Glúndub) Stewart Stíobhard steward of the royal household Taggart Mac an tSagairt son of the priest Thompson Mac Thómais son of Thomas Wilson — son of Will

Down An Dún — 29 names

Agnew Ó Gnímh descendant of Gníomh, 'action' Bell — at the bell, or 'the handsome' (bel) Campbell Mac Cathmhaoil (adopted) cam beul, 'crooked mouth' Devaney Ó Duibheamhna descendant of Dubheamhain — dubh, 'black', with Eamhain, the old name of Navan Fort Doran Ó Deoráin descendant of Deoradhán, 'the exile, the pilgrim' Ferguson Mac Fearghusa son of Fearghus, 'man-strength' Garvey Ó Gairbhith descendant of Gairbhith, 'rough peace' Gill Mac an Ghoill son of the foreigner Graham — from Grantham, Lincolnshire — 'gravelly homestead' Jenkins — (Welsh / Cornish name) 'little John' — Jenkin, a pet-form of John with the '-kin' ending Johnston Mac Seáin (sometimes) John's town Killeen Ó Cillín descendant of Cillín, a pet form of Ceallach Lowry Ó Labhradha descendant of Labhraidh, ‘speaker, spokesman’ Magee Mag Aoidh son of Aodh, 'fire' McCullough Mac Cú Uladh son of Cú Uladh, 'the Hound of Ulster' McGuinness Mag Aonghusa son of Aonghus McKeown Mac Eoin son of Eoin or Eoghan — John, or the older Irish Eoghan Merrigan Ó Muireagáin descendant of Muireagán, a diminutive of a name beginning Muir- Mitchell Mistéil from Michael Morrison Mac Muiris / Ó Muirgheasáin son of Maurice / descendant of Muirgheasán Mulgrew Ó Maolchraoibhe descendant of Maolchraoibhe, 'chief of Craobh' Murray Ó Muireadhaigh / Mac Muireadhaigh descendant of Muireadhach, 'seafarer / lord' O'Hare Ó hÍr / Ó hAichir descendant of Ír, 'long-lasting' — or of Aichear, 'fierce' Rice Rís from Welsh Rhys Rooney Ó Ruanaidh descendant of Ruanadh, 'the champion' Savage Sábhaois le sauvage — 'the wild one' Taggart Mac an tSagairt son of the priest Thompson Mac Thómais son of Thomas Wilson — son of Will

Fermanagh Fear Manach — 27 names

Bannon Ó Banáin descendant of Banán, a diminutive of bán, ‘white’ Beattie Biadhtach (source) from Bartholomew — or Irish biadhtach, 'public hospitaller' Bell — at the bell, or 'the handsome' (bel) Breslin Ó Breisleáin descendant of Breasal — the meaning of the personal name is not securely known Cassidy Ó Caiside descendant of Caiside, 'curly-haired' Corcoran Ó Corcráin descendant of Corcrán, 'purple-faced' Corrigan Ó Corragáin descendant of Corragán Devine Ó Daimhín descendant of Daimhín Flanagan Ó Flannagáin descendant of Flannagán, 'little red one' Graham — from Grantham, Lincolnshire — 'gravelly homestead' Johnston Mac Seáin (sometimes) John's town Keaveney Mac Géibheannaigh son of Géibheannach, 'fettered' Keenan Ó Cianáin descendant of Cianán, a diminutive of Cian, 'ancient' Kiernan Mac Tighearnáin son of Tighearnán, 'little lord' Lennon Ó Leannáin descendant of Leannán, 'lover' or 'sweetheart' Lunney Ó Luinigh descendant of Luineach Maguire Mag Uidhir son of Odhar, 'the dun-coloured' Mangan Ó Mongáin descendant of Mongán, a diminutive of mongach, ‘hairy’ McCaffrey Mac Gafraidh son of Godfrey McElroy Mac Giolla Rua son of the red-haired youth McGoldrick Mag Ualghairg son of Ualgharg, ‘proud-fierce’ McGrath Mac Craith son of Mac Raith, 'son of grace' McManus Mac Mághnais son of Magnus — from Latin magnus, 'great' Meehan Ó Miadhacháin descendant of Miadhachán, 'the honourable' Moroney Ó Maolruanaidh descendant of Maolruanaidh, ‘follower of Ruanaidh’ Muldoon Ó Maoldúin descendant of Maoldúin, ‘chief of the fort’ Rooney Ó Ruanaidh descendant of Ruanadh, 'the champion'

Armagh Ard Mhacha — 24 names

Adams Mac Ádhaimh son of Adam Callan Ó Cathaláin descendant of Cathalán, 'little battle-mighty one' Devaney Ó Duibheamhna descendant of Dubheamhain — dubh, 'black', with Eamhain, the old name of Navan Fort Garvey Ó Gairbhith descendant of Gairbhith, 'rough peace' Hamill Ó hÁdhmaill descendant of Ádhmall, 'quick, ready, active' Hanlon Ó hAnluain descendant of Anluan, 'great champion' Hanratty Ó hAnrachtaigh descendant of Anrachtach, 'unlawful' Hughes Mac Aodha / Ó hAodha son (or descendant) of Aodh, 'fire' Langan Ó Longáin descendant of Longán, a diminutive of long, ‘tall’ Larkin Ó Lorcáin descendant of Lorcán, 'fierce' Loughran Ó Luchaireáin descendant of Luchaireán, 'bright, glittering' McAleer Mac Giolla Uidhir son of Giolla Odhar, ‘the pale youth’ McCann Mac Cana son of Cana, 'wolf cub' — a young warrior McGuinness Mag Aonghusa son of Aonghus McNally Mac Con Allaidh son of Cú Allaidh, 'the wild hound' — the wolf Merrigan Ó Muireagáin descendant of Muireagán, a diminutive of a name beginning Muir- Mulgrew Ó Maolchraoibhe descendant of Maolchraoibhe, 'chief of Craobh' Murphy Ó Murchadha descendant of Murchadh, 'sea-warrior' O'Hagan Ó hAodhagáin descendant of Aodhagán, a diminutive of Aodh, 'fire' O'Hare Ó hÍr / Ó hAichir descendant of Ír, 'long-lasting' — or of Aichear, 'fierce' O'Neill Ó Néill descendant of Niall (Glúndub) Rogan Ó Ruadhagáin descendant of Ruadhagán — from ruadh, red Toner Ó Tomhrair descendant of Tomhrar — a Norse personal name Traynor Mac Thréinfhir son of Tréanfhear, 'champion' — literally 'strong man'

Munster

Cork Corcaigh — 94 names

Ahern Ó hEachthighearna descendant of Eachthighearna, 'lord of horses' Barrett Bairéid possibly 'quarrelsome' (baraud) Barry de Barra from Barri in Wales Begley Ó Beaglaoich descendant of the little hero, from beaglaoch Boyce Ó Buadhaigh descendant of Buadhach, ‘victorious’; or Norman ‘de Bois’, of the wood Broderick Ó Bruadair descendant of Bruadar — from the Norse personal name Broddr Buckley Ó Buachalla descendant of Buachaill, 'the herdsman' Cagney Ó Caingne descendant of Caingne — from caingean, 'a legal dispute'; an advocate's name Canavan Ó Ceanndubháin descendant of Ceanndubhán, 'the dark-headed one' Canty Ó an Cháinte descendant of the satirist, from cáinteach Carew de Carrún from Carew in Pembrokeshire — a place name, 'the fort by the ford' Carey Ó Ciardha / Ó Cearaigh descendant of Ciardha, 'the dark one' — among several distinct roots Casey Ó Cathasaigh descendant of Cathasach, 'vigilant in war' Coffey Ó Cobhthaigh descendant of Cobhthach, 'victorious' Coleman Ó Colmáin / Ó Clumháin descendant of Colmán, 'little dove' — from Latin columba Collins Ó Coileáin descendant of Coileán, 'young hound / whelp' Condon Condún de Caunteton — from Welsh Marches Cormack Ó Cormaic descendant of Cormac — 'son of Corb', or charioteer Cotter Mac Coitir son of Oitir — the Norse Ottar Coughlan Ó Cochláin / Mac Cochláin descendant or son of Cochlán — from cochall, 'cloak' or 'hood' Crean Ó Carráin descendant of Carrán — from carra, a spear Creedon Ó Críodáin descendant of Críodán Cremin Ó Cruimín descendant of Cruimín, a diminutive of crom, ‘bent’ Cronin Ó Cróinín descendant of Crónín, 'little dark-yellow one' Crowley Ó Cruadhlaoich descendant of Cruadhlaoch, 'hard hero' Culloty Ó Codlata descendant of Codladh, 'sleep' Curtin Mac Cairteáin a softened form of Mac Cartáin Daly Ó Dálaigh descendant of Dálach, 'of the assembly' Deasy Déiseach 'of the Déise' — a man of the Déise people Dennehy Ó Duineachdha descendant of Duineachaidh — read as 'humane' Dennis Ó Donnghusa descendant of Donnghus, ‘brown choice’ Desmond Ó Deasmhumhnaigh 'descendant of the Desmond man' (native of south Munster) Díaz — (Spanish name; Diaz in English) 'son of Diego' — a patronymic from the Visigothic period; El Cid himself was Rodrigo Díaz de Vivar, son of Diego Dinneen Ó Duinnín descendant of Duinnín, a diminutive of donn, 'brown' Donegan Ó Donnagáin descendant of Donnagán — a diminutive of donn, 'the dark one' or 'brown' Donovan Ó Donnabháin descendant of Donndubhán, 'dark brown-haired chief' Dorgan Ó Deargáin descendant of Deargán, 'red' Dowling Ó Dúnlaing descendant of Dúnlang Downey Ó Duibheanaigh / Ó Maoldomhnaigh descendant of Duibheanach — or, for the second sept, 'devotee of the church' Duane Ó Dubháin descendant of Dubhán, 'black' Duggan Ó Dubhagáin descendant of Dubhagán, 'the little dark one' Flynn Ó Floinn descendant of Flann, 'ruddy' Foley Ó Foghladha descendant of Foghlaidh — 'the plunderer' Forde Mac Conshnámha / Mac Giolla na Naomh / Ó Fuaráin three Irish names all mistranslated as 'ford': 'son of the swimming-hound' (Leitrim), 'son of the devotee of the saints' (Galway), 'descendant of Fuarthán, the cold one' (Cork) Galvin Ó Gealbháin descendant of Gealbhán, 'bright-white' Gavin Ó Gábháin descendant of Gábhadhán, a diminutive of gábhadh, ‘want, need, danger’ Gleeson Ó Glasáin descendant of Glasán — from glas, grey Hallinan Ó hAilgheanáin descendant of Ailgheanán, 'noble offspring' Hanafin Ó hAinbhtheáin descendant of Ainbhtheán, a diminutive of Ainbhioth Harnett Ó hAirtnéada descendant of Airtnéada, 'battle-bear' or 'battle-stone' — a meaning Woulfe reconstructs rather than finds written Hayes Ó hAodha descendant of Aodh, 'fire' Healy Ó hÉilidhe / Ó hÉalaighthe 'claimant' (Sligo) or 'ingenious' (Cork) Hegarty Ó hÁgartaigh descendant of Fágartach Hennessy Ó hAonghusa descendant of Aonghus Hore de Hór hoar — 'grey-haired' Horgan Ó hArgáin descendant of Anradhán, 'warrior, champion' Hurley Ó hUrthuile / Ó Muirthile descendant of Urthuile — 'sea-tide' Kelleher Ó Céileachair descendant of Céileachar, 'companion-loving' Langan Ó Longáin descendant of Longán, a diminutive of long, ‘tall’ Leahy Ó Laochdha descendant of Laochdha, 'heroic' Lehane Ó Liatháin descendant of Liathán, 'grey' Linehan Ó Luingeacháin descendant of Longachán Lombard Lombard 'the Lombard' — an Italian banker Looney Ó Luanaigh descendant of Luanach, 'warrior' (luan, champion) Lucey Ó Luasaigh a corruption of Mac Cluasaigh Lynch Ó Loingsigh / de Lench descendant of Loingseach, 'mariner' Mangan Ó Mongáin descendant of Mongán, a diminutive of mongach, ‘hairy’ McCarthy Mac Cárthaigh son of Cárthach, 'loving' Moynihan Ó Muimhneacháin descendant of the Munsterman Murphy Ó Murchadha descendant of Murchadh, 'sea-warrior' Noonan Ó Nuanáin descendant of Ionmhaineán, 'the beloved' O'Callaghan Ó Ceallacháin descendant of Ceallachán of Cashel O'Donoghue Ó Donnchadha descendant of Donnchadh O'Driscoll Ó hEidirsceoil descendant of the eidirsceol — 'the go-between, the interpreter' O'Gara Ó Gadhra descendant of Gadhra, perhaps from gadhar, ‘a mastiff’ O'Keeffe Ó Caoimh descendant of Caomh, 'gentle, beloved' O'Leary Ó Laoghaire descendant of Laoghaire, 'calf-keeper' O'Mahony Ó Mathghamhna descendant of Mathghamhain, 'bear' O'Rahilly Ó Raithile descendant of Raithile O'Sullivan Ó Súilleabháin descendant of Súildubhán, 'dark-eyed one' Quirke Ó Cuirce descendant of Corc, ‘heart’ Regan Ó Riagáin descendant of Riagán, 'little king' (or 'impulsive') Ring Ó Rinn descendant of Reann, ‘spear’ Riordan Ó Ríoghbhardáin descendant of Ríoghbhardán, 'royal little bard' Roche de Róiste de la roche — 'of the rock' Ronan Ó Rónáin descendant of Rónán, 'little seal' Scanlon Ó Scannláin descendant of Scannlán — from scannal, 'contention' or 'strife' Sheehan Ó Síodhacháin descendant of Síodhach, 'the peaceful' Shine Ó Seighin descendant of Seighin, 'wild ox' Spillane Ó Spealáin descendant of Spealán — from speal, a scythe Sweeney Mac Suibhne son of Suibhne, 'well-going' Tuohy Ó Tuathaigh descendant of Tuathach, 'rustic' or 'lord' Twomey Ó Tuama descendant of Tuaim — 'burial mound' Woulfe de Bhulbh le woulf — 'the wolf'

Limerick Luimneach — 63 names

Canty Ó an Cháinte descendant of the satirist, from cáinteach Carmody Ó Cearmada descendant of Cearmaid — a very ancient personal name Casey Ó Cathasaigh descendant of Cathasach, 'vigilant in war' Clohessy Ó Clochasaigh descendant of Clochasach Collins Ó Coileáin descendant of Coileán, 'young hound / whelp' Creagh Craobhach 'of the branch' — from craobh, a branch Cremin Ó Cruimín descendant of Cruimín, a diminutive of crom, ‘bent’ Culhane Ó Cathláin descendant of Cathalán, 'battle-mighty' Curtin Mac Cairteáin a softened form of Mac Cartáin Danaher Ó Duineachair descendant of Duineachar, ‘man-loving’ Donovan Ó Donnabháin descendant of Donndubhán, 'dark brown-haired chief' Duane Ó Dubháin descendant of Dubhán, 'black' Enright Mac Ionnrachtaigh son of Ionnrachtach, 'unlawful' Fitzgerald Mac Gearailt fitz Gerald — son of Gerald (of Windsor) Fitzgibbon Mac Giobúin son of Gibbon — Norman French fitz, 'son of', and a pet form of Gilbert Flannery Ó Flannabhra descendant of Flannabhra, 'red-eyebrows' Gleeson Ó Glasáin descendant of Glasán — from glas, grey Griffin Ó Gríobhtha descendant of Gríobhtha, 'griffin-like' Hallinan Ó hAilgheanáin descendant of Ailgheanán, 'noble offspring' Halpin Ó hAilpín descendant of Ailpín Hannigan Ó hAnnagáin descendant of Annagán — from annadh, delay Hannon Ó hAnnáin descendant of Annán — from annadh, delay Hanrahan Ó hAnradháin descendant of Anradhán, 'warrior, champion' Harnett Ó hAirtnéada descendant of Airtnéada, 'battle-bear' or 'battle-stone' — a meaning Woulfe reconstructs rather than finds written Hartigan Ó hArtagáin descendant of Artagán, 'little Art' Hassett Ó hAiseadha descendant of Aisidh, 'strife' Hayes Ó hAodha descendant of Aodh, 'fire' Heffernan Ó hIfearnáin descendant of Ifearnán Hehir Ó hAichir descendant of Aichear, ‘sharp, bitter, angry’ Hickey Ó hÍcidhe descendant of the healer (íce, 'healing') Hurley Ó hUrthuile / Ó Muirthile descendant of Urthuile — 'sea-tide' Hynes Ó hEidhin descendant of Eidhean, ‘ivy’ Jenkins — (Welsh / Cornish name) 'little John' — Jenkin, a pet-form of John with the '-kin' ending Kiely Ó Cadhla descendant of Cadhla, 'graceful' Kirby Ó Ciarmhaic descendant of Ciarmhac, 'dark son' Lacey de Léis Norman ‘de Laci’, of Lassy in France; or Ó Laitheasa, descendant of Flaitheas Langan Ó Longáin descendant of Longán, a diminutive of long, ‘tall’ Leahy Ó Laochdha descendant of Laochdha, 'heroic' Linehan Ó Luingeacháin descendant of Longachán Madigan Ó Madagáin the same as Ó Madáin (Madden) McInerney Mac an Airchinnigh son of the erenagh — the hereditary steward of church lands Moloney Ó Maoldhomhnaigh descendant of Maoldomhnaigh, 'devoted to Sunday, or to the Church' Moroney Ó Maolruanaidh descendant of Maolruanaidh, ‘follower of Ruanaidh’ Mulcahy Ó Maolchathaigh descendant of the devotee of St Cathach ('battle') Mulqueen Ó Maolchaoin descendant of Maolcaoin, 'gentle chief' Mulvihill Ó Maoilmhichil descendant of the servant of St Michael Noonan Ó Nuanáin descendant of Ionmhaineán, 'the beloved' Normoyle Mac Confhormaoile son of Cú Fhormaoile, ‘hound of Formoyle’, a place in Co. Clare O'Brien Ó Briain descendant of Brian (Boru) O'Gara Ó Gadhra descendant of Gadhra, perhaps from gadhar, ‘a mastiff’ O'Grady Ó Gráda descendant of Gráda, 'noble, illustrious' O'Rahilly Ó Raithile descendant of Raithile O'Shaughnessy Ó Seachnasaigh descendant of Seachnasach Roche de Róiste de la roche — 'of the rock' Ryan Ó Maoilriain descendant of Maoilriaghain Sexton Ó Seasnáin descendant of Seasnán Sheedy Mac Síoda son of Síoda, 'silk' Sheehan Ó Síodhacháin descendant of Síodhach, 'the peaceful' Sheehy Mac Síthigh son of Sítheach, 'the peaceful' — or 'the otherworldly' Shine Ó Seighin descendant of Seighin, 'wild ox' Wall de Bhál du val — 'of the valley' Wallace de Bhailís le waleis — 'the Welshman, the foreigner' Woulfe de Bhulbh le woulf — 'the wolf'

Clare An Clár — 60 names

Ahern Ó hEachthighearna descendant of Eachthighearna, 'lord of horses' Carmody Ó Cearmada descendant of Cearmaid — a very ancient personal name Carty Ó Cárthaigh descendant of Cárthach, 'loving' Clancy Mac Fhlannchaidh son of Flannchadh, 'the red warrior' Clohessy Ó Clochasaigh descendant of Clochasach Colgan Ó Colgáin descendant of Colga — from colg, 'sword' or 'thorn' Conroy Ó Maolchonaire descendant of Maolchonaire, 'follower of Conaire' Considine Mac Consaidín son of Constantine Conway Ó Connmhaigh descendant of Connmhach Cooney Ó Cuana descendant of Cuana Creagh Craobhach 'of the branch' — from craobh, a branch Cusack Ciomhsóg from Cussac in Guyenne Davoren Ó Duibhdábhoireann descendant of Dubhdábhoireann, 'black of the two Burrens' Deegan Ó Duibhginn descendant of Dubhcheann, ‘black head’ Drennan Ó Draighneáin descendant of Draighneán, ‘blackthorn’ Enright Mac Ionnrachtaigh son of Ionnrachtach, 'unlawful' Galvin Ó Gealbháin descendant of Gealbhán, 'bright-white' Gorman Mac Gormáin son of Gormán, 'the noble dark one' Griffin Ó Gríobhtha descendant of Gríobhtha, 'griffin-like' Hanrahan Ó hAnradháin descendant of Anradhán, 'warrior, champion' Harkin Ó hEarcáin descendant of Earcán, a diminutive of earc, ‘red, speckled’ Hartigan Ó hArtagáin descendant of Artagán, 'little Art' Hassett Ó hAiseadha descendant of Aisidh, 'strife' Hehir Ó hAichir descendant of Aichear, ‘sharp, bitter, angry’ Hickey Ó hÍcidhe descendant of the healer (íce, 'healing') Hogan Ó hÓgáin descendant of Ógán, 'the young one' Hurley Ó hUrthuile / Ó Muirthile descendant of Urthuile — 'sea-tide' Hynes Ó hEidhin descendant of Eidhean, ‘ivy’ Keane Ó Catháin descendant of Cathán, 'little battler' Kennedy Ó Cinnéide descendant of Cinnéidigh, 'helmeted head' Killeen Ó Cillín descendant of Cillín, a pet form of Ceallach Looney Ó Luanaigh descendant of Luanach, 'warrior' (luan, champion) Lydon Ó Lodáin descendant of Lodán Lynch Ó Loingsigh / de Lench descendant of Loingseach, 'mariner' Lysaght Mac Giolla Iasachta son of Giolla Iasachta, ‘strange youth’ MacNamara Mac Conmara son of Cú Mara, 'hound of the sea' Madigan Ó Madagáin the same as Ó Madáin (Madden) McGrath Mac Craith son of Mac Raith, 'son of grace' McInerney Mac an Airchinnigh son of the erenagh — the hereditary steward of church lands McMahon Mac Mathghamhna son of Mathghamhain, 'bear' Minogue Ó Muineog descendant of Muineog — a diminutive of manach, 'monk' Moloney Ó Maoldhomhnaigh descendant of Maoldomhnaigh, 'devoted to Sunday, or to the Church' Moroney Ó Maolruanaidh descendant of Maolruanaidh, ‘follower of Ruanaidh’ Mulqueen Ó Maolchaoin descendant of Maolcaoin, 'gentle chief' Naughton Ó Neachtain descendant of Neachtan — an old name linked to water Nealon Ó Nialláin descendant of Niallán, 'little Niall' Normoyle Mac Confhormaoile son of Cú Fhormaoile, ‘hound of Formoyle’, a place in Co. Clare O'Brien Ó Briain descendant of Brian (Boru) O'Callaghan Ó Ceallacháin descendant of Ceallachán of Cashel O'Dea Ó Deághaidh descendant of Deághaidh, a tenth-century chieftain O'Grady Ó Gráda descendant of Gráda, 'noble, illustrious' O'Halloran Ó hAllmhuráin descendant of Allmhurán, 'the stranger from over the sea' Quinn Ó Cuinn descendant of Conn, 'chief' Reidy Ó Riada descendant of Riada, ‘tamed, trained’ Sexton Ó Seasnáin descendant of Seasnán Shanahan Ó Seanacháin descendant of Seanachán, 'the old, wise one' Sheedy Mac Síoda son of Síoda, 'silk' Slattery Ó Slatara descendant of Slatra, 'the strong, bold' Troy Ó Troighthigh descendant of Troightheach, 'the foot-soldier' Vaughan Ó Mocháin / Vaughan Welsh fychan, 'small' — adopted for Ó Mocháin

Kerry Ciarraí — 58 names

Breen Ó Braoin descendant of Braon, 'sadness' or 'sorrow' Brosnan Ó Brosnacháin of Brosna — the river and village in Kerry Buckley Ó Buachalla descendant of Buachaill, 'the herdsman' Cahill Ó Cathail descendant of Cathal — cath, 'battle', with either 'rule' or 'great' Canty Ó an Cháinte descendant of the satirist, from cáinteach Carmody Ó Cearmada descendant of Cearmaid — a very ancient personal name Crean Ó Carráin descendant of Carrán — from carra, a spear Cremin Ó Cruimín descendant of Cruimín, a diminutive of crom, ‘bent’ Cronin Ó Cróinín descendant of Crónín, 'little dark-yellow one' Culloty Ó Codlata descendant of Codladh, 'sleep' Curran Ó Corráin descendant of Corrán Curtin Mac Cairteáin a softened form of Mac Cartáin Deegan Ó Duibhginn descendant of Dubhcheann, ‘black head’ Díaz — (Spanish name; Diaz in English) 'son of Diego' — a patronymic from the Visigothic period; El Cid himself was Rodrigo Díaz de Vivar, son of Diego Dowling Ó Dúnlaing descendant of Dúnlang Downey Ó Duibheanaigh / Ó Maoldomhnaigh descendant of Duibheanach — or, for the second sept, 'devotee of the church' Fitzgerald Mac Gearailt fitz Gerald — son of Gerald (of Windsor) Foley Ó Foghladha descendant of Foghlaidh — 'the plunderer' Galvin Ó Gealbháin descendant of Gealbhán, 'bright-white' Greaney Ó Gráinne descendant of Gráinne — a woman's name Griffin Ó Gríobhtha descendant of Gríobhtha, 'griffin-like' Hanafin Ó hAinbhtheáin descendant of Ainbhtheán, a diminutive of Ainbhioth Harnett Ó hAirtnéada descendant of Airtnéada, 'battle-bear' or 'battle-stone' — a meaning Woulfe reconstructs rather than finds written Horgan Ó hArgáin descendant of Anradhán, 'warrior, champion' Kelleher Ó Céileachair descendant of Céileachar, 'companion-loving' Kirby Ó Ciarmhaic descendant of Ciarmhac, 'dark son' Kissane Ó Casáin descendant of Casán — from cas, curly Lalor Ó Leathlobhair descendant of Leathlobhar Langan Ó Longáin descendant of Longán, a diminutive of long, ‘tall’ Leahy Ó Laochdha descendant of Laochdha, 'heroic' Linehan Ó Luingeacháin descendant of Longachán Lyons Ó Laighin descendant of Laighean, 'lance, spear' McCarthy Mac Cárthaigh son of Cárthach, 'loving' Moriarty Ó Muircheartaigh descendant of Muircheartach, 'skilled navigator' — from muir, the sea Moynihan Ó Muimhneacháin descendant of the Munsterman Mulvihill Ó Maoilmhichil descendant of the servant of St Michael O'Connell Ó Conaill descendant of Conall — a name built from 'hound' and 'valour' O'Connor Ó Conchobhair descendant of Conchobhar, 'lover of hounds' O'Donoghue Ó Donnchadha descendant of Donnchadh O'Gara Ó Gadhra descendant of Gadhra, perhaps from gadhar, ‘a mastiff’ O'Mahony Ó Mathghamhna descendant of Mathghamhain, 'bear' O'Rahilly Ó Raithile descendant of Raithile O'Shea Ó Séaghdha descendant of Séaghdha, 'hawk-like, stately' O'Sullivan Ó Súilleabháin descendant of Súildubhán, 'dark-eyed one' Quinlan Ó Caoindealbháin descendant of Caoindealbhán, 'gracefully shaped' Quirke Ó Cuirce descendant of Corc, ‘heart’ Reidy Ó Riada descendant of Riada, ‘tamed, trained’ Rice Rís from Welsh Rhys Riordan Ó Ríoghbhardáin descendant of Ríoghbhardán, 'royal little bard' Scanlon Ó Scannláin descendant of Scannlán — from scannal, 'contention' or 'strife' Shanahan Ó Seanacháin descendant of Seanachán, 'the old, wise one' Sheehan Ó Síodhacháin descendant of Síodhach, 'the peaceful' Sheehy Mac Síthigh son of Sítheach, 'the peaceful' — or 'the otherworldly' Shine Ó Seighin descendant of Seighin, 'wild ox' Stack Stac uncertain — perhaps 'haystack-built' Sugrue Ó Siocfhradha descendant of Siocfhraidh — the Norse Sigefrith, 'victory-peace' Sweeney Mac Suibhne son of Suibhne, 'well-going' Twomey Ó Tuama descendant of Tuaim — 'burial mound'

Tipperary Tiobraid Árann — 53 names

Butler de Buitléir le botiler — the (chief) butler of Ireland Cahill Ó Cathail descendant of Cathal — cath, 'battle', with either 'rule' or 'great' Cantwell Cantual from Kentwell, Suffolk Carew de Carrún from Carew in Pembrokeshire — a place name, 'the fort by the ford' Carroll Ó Cearbhaill descendant of Cearbhall, 'fierce in battle' Carty Ó Cárthaigh descendant of Cárthach, 'loving' Coleman Ó Colmáin / Ó Clumháin descendant of Colmán, 'little dove' — from Latin columba Condon Condún de Caunteton — from Welsh Marches Corcoran Ó Corcráin descendant of Corcrán, 'purple-faced' Danaher Ó Duineachair descendant of Duineachar, ‘man-loving’ Davoren Ó Duibhdábhoireann descendant of Dubhdábhoireann, 'black of the two Burrens' Donegan Ó Donnagáin descendant of Donnagán — a diminutive of donn, 'the dark one' or 'brown' Dwyer Ó Dubhuidhir descendant of Dubhodhar, ‘black Odhar’ Egan Mac Aodhagáin son of little Aodh Fennelly Ó Fionnghalaigh descendant of Fionnghalach, 'fair-valorous' Fogarty Ó Fógartaigh descendant of Fógartach, 'the banished' or 'proclaimed' Gaffney Ó Gamhna descendant of Gamhain, 'calf' Gleeson Ó Glasáin descendant of Glasán — from glas, grey Hackett Haicéid son of Haket, a Norman personal name Hanrahan Ó hAnradháin descendant of Anradhán, 'warrior, champion' Hayden Ó hEideáin descendant of Eideadhán, a diminutive of Eideadh Hayes Ó hAodha descendant of Aodh, 'fire' Heffernan Ó hIfearnáin descendant of Ifearnán Hickey Ó hÍcidhe descendant of the healer (íce, 'healing') Hogan Ó hÓgáin descendant of Ógán, 'the young one' Horan Ó hArracháin descendant of Anradhán, 'warrior, champion' Kealy Ó Caollaidhe descendant of Caollaidhe Kearney Ó Cearnaigh / Ó Catharnaigh descendant of Cearnach, 'victorious' Keating Céitinn possibly Welsh cethin, 'dusky' Kennedy Ó Cinnéide descendant of Cinnéidigh, 'helmeted head' Keogh Mac Eochaidh son of Eochaidh — from each, 'horse' Leahy Ó Laochdha descendant of Laochdha, 'heroic' Lonergan Ó Longargáin descendant of Longargán, a diminutive of lonngarg, ‘strong-fierce’ Maher Ó Meachair descendant of Meachar, 'hospitable' Moloney Ó Maoldhomhnaigh descendant of Maoldomhnaigh, 'devoted to Sunday, or to the Church' Moroney Ó Maolruanaidh descendant of Maolruanaidh, ‘follower of Ruanaidh’ Mulcahy Ó Maolchathaigh descendant of the devotee of St Cathach ('battle') O'Brien Ó Briain descendant of Brian (Boru) Prendergast de Priondargás from Brontegeest in Flanders Purcell Puirséil pourcel — 'piglet' (a herdsman's name) Quinlan Ó Caoindealbháin descendant of Caoindealbhán, 'gracefully shaped' Quirke Ó Cuirce descendant of Corc, ‘heart’ Ryan Ó Maoilriain descendant of Maoilriaghain Scully Ó Scolaidhe descendant of the scholar Shanahan Ó Seanacháin descendant of Seanachán, 'the old, wise one' Sheedy Mac Síoda son of Síoda, 'silk' Sheehy Mac Síthigh son of Sítheach, 'the peaceful' — or 'the otherworldly' Slattery Ó Slatara descendant of Slatra, 'the strong, bold' Spillane Ó Spealáin descendant of Spealán — from speal, a scythe Tierney Ó Tighearnaigh descendant of Tighearnach, 'lordly' Tobin Tóibín de St Aubyn Treacy Ó Treasaigh descendant of Treasach, 'the fierce, the warlike' Troy Ó Troighthigh descendant of Troightheach, 'the foot-soldier'

Leinster

Kilkenny Cill Chainnigh — 29 names

Archer Áirséir the bowman Aylward Aighleart æthel-weard, 'noble guardian' Boyce Ó Buadhaigh descendant of Buadhach, ‘victorious’; or Norman ‘de Bois’, of the wood Brennan Ó Braonáin descendant of Braonán, 'little drop / sorrow' Broderick Ó Bruadair descendant of Bruadar — from the Norse personal name Broddr Brophy Ó Bróithe descendant of Brothe Butler de Buitléir le botiler — the (chief) butler of Ireland Cantwell Cantual from Kentwell, Suffolk Cody Mac Óda son of Odo Comerford Comartún from Comberford, Staffordshire Coogan Ó Cuagáin / Mac Cogadháin descendant of Cuagán (Kilkenny line); or son of Cogadhán, from Cú Chogaidh, 'war-hound' (Leitrim line) Delaney Ó Dubhshláine descendant of Dubhshláine, 'dark one of the Slaney' Drennan Ó Draighneáin descendant of Draighneán, ‘blackthorn’ Fennelly Ó Fionnghalaigh descendant of Fionnghalach, 'fair-valorous' Fitzpatrick Mac Giolla Phádraig son of the devotee of Patrick Gaffney Ó Gamhna descendant of Gamhain, 'calf' Gleeson Ó Glasáin descendant of Glasán — from glas, grey Grace Grás le gras — 'the stout' Hackett Haicéid son of Haket, a Norman personal name Kealy Ó Caollaidhe descendant of Caollaidhe Lonergan Ó Longargáin descendant of Longargán, a diminutive of lonngarg, ‘strong-fierce’ O'Shea Ó Séaghdha descendant of Séaghdha, 'hawk-like, stately' Purcell Puirséil pourcel — 'piglet' (a herdsman's name) Sherlock Scurlóg 'fair-locked' — bright-haired Shortall Seartal 'short neck' (a nickname) Tobin Tóibín de St Aubyn Tynan Ó Teimhneáin descendant of Teimhneán, 'dark, grey' Walsh Breathnach 'the Welshman' — soldiers who came with the Normans Whelan Ó Faoláin descendant of Faolán, 'little wolf'

Wexford Loch Garman — 28 names

Bulger Ó Bolguidhir descendant of Bolgodhar — perhaps a nickname Cody Mac Óda son of Odo Connery Ó Conaire descendant of Conaire, 'keeper of the hound' Cullen Ó Cuilinn descendant of Cuileann, 'holly' Darcy Ó Dorchaidhe / d'Arcy descendant of Dorchaidh, 'dark one' — or from Arcy in France Deegan Ó Duibhginn descendant of Dubhcheann, ‘black head’ Devereux Deabhrús from Évreux in Normandy Doran Ó Deoráin descendant of Deoradhán, 'the exile, the pilgrim' Doyle Ó Dubhghaill descendant of Dubhghall, 'dark foreigner' — a Viking Esmonde Easmonn east-mund, 'grace-protector' French de Fréins 'the Frenchman' Furlong Furlong from the furrow-length of a ploughed field Hore de Hór hoar — 'grey-haired' Kavanagh Caomhánach follower of St Caomhán Keating Céitinn possibly Welsh cethin, 'dusky' Kehoe Mac Eochaidh son of Eochaidh — from each, 'horse' Kinsella Cinnsealach of the Uí Cheinnsealaigh — the royal line of south Leinster Lacey de Léis Norman ‘de Laci’, of Lassy in France; or Ó Laitheasa, descendant of Flaitheas Larkin Ó Lorcáin descendant of Lorcán, 'fierce' Lynam Ó Laidhghneáin descendant of Laidhghneán, 'snow-birth' Masterson Mac an Mháighistir son of the master, from máighistir (Latin magister) Murphy Ó Murchadha descendant of Murchadh, 'sea-warrior' Nolan Ó Nualláin descendant of Nuallán, 'famous, noble' Prendergast de Priondargás from Brontegeest in Flanders Redmond Réamonn from Raymond (le Gros) Roche de Róiste de la roche — 'of the rock' Sinnott Sionóid sige-noth, 'victory-bold' Whelan Ó Faoláin descendant of Faolán, 'little wolf'

Laois Laois — 26 names

Behan Ó Beacháin descendant of Beachán — from beach, 'bee' Bergin Ó hAimheirgin descendant of Aimhirgin, 'wondrous birth' Brophy Ó Bróithe descendant of Brothe Cronan Ó Crónáin descendant of Crónán — a pet form of Crón, 'dark' or 'swarthy' Deegan Ó Duibhginn descendant of Dubhcheann, ‘black head’ Delaney Ó Dubhshláine descendant of Dubhshláine, 'dark one of the Slaney' Dempsey Ó Díomasaigh descendant of Díomasach, 'the proud' Dooley Ó Dubhlaoich descendant of Dubhlaoch — dubh, 'dark', and laoch, 'warrior' Doran Ó Deoráin descendant of Deoradhán, 'the exile, the pilgrim' Dowling Ó Dúnlaing descendant of Dúnlang Drennan Ó Draighneáin descendant of Draighneán, ‘blackthorn’ Duff Ó Duibh descendant of Dubh, 'the black' or 'dark' Dunne Ó Doinn descendant of Donn, 'the brown-haired' (or the god of the dead) Fitzpatrick Mac Giolla Phádraig son of the devotee of Patrick Gorman Mac Gormáin son of Gormán, 'the noble dark one' Grace Grás le gras — 'the stout' Harrigan Ó hArragáin descendant of Anradhán, 'warrior, champion' Horan Ó hArracháin descendant of Anradhán, 'warrior, champion' Kealy Ó Caollaidhe descendant of Caollaidhe Lalor Ó Leathlobhair descendant of Leathlobhar McEvoy Mac Fhíodhbhuidhe son of Fíodhbhadhach, ‘of the wood, woodman’ Moore Ó Mórdha descendant of Mórdha, 'majestic' Mulhall Ó Maolchathail descendant of Maolchathail, ‘servant of St Cathal’ Regan Ó Riagáin descendant of Riagán, 'little king' (or 'impulsive') Treacy Ó Treasaigh descendant of Treasach, 'the fierce, the warlike' Tynan Ó Teimhneáin descendant of Teimhneán, 'dark, grey'

Offaly Uíbh Fhailí — 24 names

Bannon Ó Banáin descendant of Banán, a diminutive of bán, ‘white’ Behan Ó Beacháin descendant of Beachán — from beach, 'bee' Bergin Ó hAimheirgin descendant of Aimhirgin, 'wondrous birth' Carroll Ó Cearbhaill descendant of Cearbhall, 'fierce in battle' Colgan Ó Colgáin descendant of Colga — from colg, 'sword' or 'thorn' Corbett Corbaid 'son of Corbet' — from French corbeau, a raven Corcoran Ó Corcráin descendant of Corcrán, 'purple-faced' Coughlan Ó Cochláin / Mac Cochláin descendant or son of Cochlán — from cochall, 'cloak' or 'hood' Deegan Ó Duibhginn descendant of Dubhcheann, ‘black head’ Dempsey Ó Díomasaigh descendant of Díomasach, 'the proud' Dooley Ó Dubhlaoich descendant of Dubhlaoch — dubh, 'dark', and laoch, 'warrior' Egan Mac Aodhagáin son of little Aodh Flanagan Ó Flannagáin descendant of Flannagán, 'little red one' Guilfoyle Mac Giolla Phóil son of the servant of St Paul Hennessy Ó hAonghusa descendant of Aonghus Killeen Ó Cillín descendant of Cillín, a pet form of Ceallach Madden Ó Madáin descendant of Madán (from madadh, 'hound') Malone Ó Maoileoin descendant of Maoileoin, 'devotee of St John' Minogue Ó Muineog descendant of Muineog — a diminutive of manach, 'monk' Molloy Ó Maolmhuaidh descendant of Maolmhuadh, 'noble chief' Mulhall Ó Maolchathail descendant of Maolchathail, ‘servant of St Cathal’ O'Connor Ó Conchobhair descendant of Conchobhar, 'lover of hounds' Rigney Ó Raigne a variant of Ó Raighne; Woulfe gives no meaning here Shiel Ó Siadhail descendant of Siadhal

Connacht

Galway Gaillimh — 81 names

Bermingham Mac Fheorais from Birmingham, England Blake de Bláca le blac — 'the black-haired' Bodkin Boidicín a nickname from a short dagger Broderick Ó Bruadair descendant of Bruadar — from the Norse personal name Broddr Burke de Búrca from de Burgh — 'of the borough' Cahill Ó Cathail descendant of Cathal — cath, 'battle', with either 'rule' or 'great' Canavan Ó Ceanndubháin descendant of Ceanndubhán, 'the dark-headed one' Clarke Ó Cléirigh descendant of the cleric — possibly Europe's oldest surname (916 AD) Concannon Ó Concheanainn descendant of Cú Cheanainn, 'fair-headed hound' Conneely Mac Conghaile / Ó Conghaile son of Conghal — 'hound' and 'valour' Connolly Ó Conghalaigh descendant of Conghalach, 'valiant as a hound' Conway Ó Connmhaigh descendant of Connmhach Cooney Ó Cuana descendant of Cuana Costello Mac Oisdealbhaigh son of Oisdealbh — the first Norman family to take a 'Mac' Coyne Ó Cadhain descendant of Cadhan — a personal name from the barnacle goose Cunningham Ó Connagáin descendant of Connagán, a diminutive of Conn Daly Ó Dálaigh descendant of Dálach, 'of the assembly' Darcy Ó Dorchaidhe / d'Arcy descendant of Dorchaidh, 'dark one' — or from Arcy in France Deegan Ó Duibhginn descendant of Dubhcheann, ‘black head’ Diskin Ó Díscín descendant of Díscín, a diminutive of díosc (apparently not a personal name) Dolan Ó Dubhláin descendant of Dobhailen Donnellan Ó Domhnalláin descendant of Domhnallán, a diminutive of Domhnall, 'world-ruler' Downey Ó Duibheanaigh / Ó Maoldomhnaigh descendant of Duibheanach — or, for the second sept, 'devotee of the church' Drennan Ó Draighneáin descendant of Draighneán, ‘blackthorn’ Duane Ó Dubháin descendant of Dubhán, 'black' Duggan Ó Dubhagáin descendant of Dubhagán, 'the little dark one' Egan Mac Aodhagáin son of little Aodh Faherty Ó Fathartaigh descendant of Fathartach Fahy Ó Fathaigh descendant of Fathadh, 'foundation / green field' Fallon Ó Fallamhain descendant of Fallamhan, 'leader' Feeney Ó Fiannaidhe descendant of Fiannaidhe, 'soldier' Finn Ó Finn descendant of Fionn, 'fair' Finnegan Ó Fionnagáin descendant of Fionnagán, 'little fair one' Finnerty Ó Fionnachta descendant of Fionnachta, 'fair-snow' Forde Mac Conshnámha / Mac Giolla na Naomh / Ó Fuaráin three Irish names all mistranslated as 'ford': 'son of the swimming-hound' (Leitrim), 'son of the devotee of the saints' (Galway), 'descendant of Fuarthán, the cold one' (Cork) French de Fréins 'the Frenchman' Geraghty Mag Oireachtaigh son of Oireachtach, 'member of an assembly' Greaney Ó Gráinne descendant of Gráinne — a woman's name Hughes Mac Aodha / Ó hAodha son (or descendant) of Aodh, 'fire' Hynes Ó hEidhin descendant of Eidhean, ‘ivy’ Jennings Mac Sheóinín son of little John Joyce Seoighe from Josse, a Breton saint's name Keane Ó Catháin descendant of Cathán, 'little battler' Kelly Ó Ceallaigh descendant of Ceallach, 'bright-headed' or 'strife' Kenny Ó Cionnaith descendant of Cionnaith Killeen Ó Cillín descendant of Cillín, a pet form of Ceallach Kirwan Ó Ciardubháin descendant of Ciardhubhán, 'the black-dark one' Kissane Ó Casáin descendant of Casán — from cas, curly Larkin Ó Lorcáin descendant of Lorcán, 'fierce' Lennon Ó Leannáin descendant of Leannán, 'lover' or 'sweetheart' Lydon Ó Lodáin descendant of Lodán Lynch Ó Loingsigh / de Lench descendant of Loingseach, 'mariner' Lyons Ó Laighin descendant of Laighean, 'lance, spear' Madden Ó Madáin descendant of Madán (from madadh, 'hound') Mannion Ó Mainnín descendant of Mainnín — perhaps the same as Mainchín Martin Mac Giolla Mháirtín / Máirtín devotee of St Martin McDonagh Mac Donnchadha son of Donnchadh Meehan Ó Miadhacháin descendant of Miadhachán, 'the honourable' Mitchell Mistéil from Michael Mooney Ó Maonaigh descendant of Maonach Moroney Ó Maolruanaidh descendant of Maolruanaidh, ‘follower of Ruanaidh’ Mullally Ó Maolalaidh descendant of Maolaladh, 'speckled chief' Mullan Ó Maoláin descendant of Maolán, 'the tonsured one' Naughton Ó Neachtain descendant of Neachtan — an old name linked to water Nealon Ó Nialláin descendant of Niallán, 'little Niall' Nevin Mac Cnáimhín son of Cnáimhín — from cnámh, bone O'Connell Ó Conaill descendant of Conall — a name built from 'hound' and 'valour' O'Flaherty Ó Flaithbheartaigh descendant of Flaithbheartach, 'bright ruler' O'Grady Ó Gráda descendant of Gráda, 'noble, illustrious' O'Halloran Ó hAllmhuráin descendant of Allmhurán, 'the stranger from over the sea' O'Shaughnessy Ó Seachnasaigh descendant of Seachnasach Patterson Mac Páidín son of Páidín, a pet form of Patrick Raftery Ó Reachtabhra descendant of Reachtabhra — 'law' and 'fringe' Roddy Ó Rodaigh descendant of Rodach, 'strong' Ruane Ó Ruadháin descendant of Ruadhán, a diminutive of ruadh, ‘red’ Seery Ó Saoraidhe a later form of Ó Síoghradha, descendant of Síoghraidh, the Norse Sigefrith Treacy Ó Treasaigh descendant of Treasach, 'the fierce, the warlike' Tully Mac an Tuile / Ó Maoltuile son of the flood — 'of God's will' Tuohy Ó Tuathaigh descendant of Tuathach, 'rustic' or 'lord' Ward Mac an Bhaird son of the bard Watters Mac Uaitéir / Ó hUisce / Ó Fuaruisce 'son of Walter' (Mac Uaitéir) — or, for the Gaelic septs, names built on 'uisce', water: 'descendant of the water' (Ó hUisce), 'cold water' (Ó Fuaruisce)

Mayo Maigh Eo — 64 names

Bannon Ó Banáin descendant of Banán, a diminutive of bán, ‘white’ Barrett Bairéid possibly 'quarrelsome' (baraud) Blake de Bláca le blac — 'the black-haired' Bradley Ó Brolcháin descendant of Brolachán, a diminutive of Brólach Brogan Ó Brógáin descendant of Brógán — probably from bróg, 'shoe' Burke de Búrca from de Burgh — 'of the borough' Cafferty Mac Eachmharcaigh son of Eachmharcach, 'horse-rider' Carey Ó Ciardha / Ó Cearaigh descendant of Ciardha, 'the dark one' — among several distinct roots Conneely Mac Conghaile / Ó Conghaile son of Conghal — 'hound' and 'valour' Costello Mac Oisdealbhaigh son of Oisdealbh — the first Norman family to take a 'Mac' Coyne Ó Cadhain descendant of Cadhan — a personal name from the barnacle goose Dillon Diolún from de Leon Durcan Mac Dhuarcáin son of Duarcán Fitzgibbon Mac Giobúin son of Gibbon — Norman French fitz, 'son of', and a pet form of Gilbert Flannery Ó Flannabhra descendant of Flannabhra, 'red-eyebrows' Garvey Ó Gairbhith descendant of Gairbhith, 'rough peace' Gaughan Ó Gáibhtheacháin descendant of Gáibhtheachán, 'plaintive' Gill Mac an Ghoill son of the foreigner Halligan Ó hAilleagáin descendant of Ailleagán, a diminutive of áille, ‘handsome, beautiful’ Hallinan Ó hAilgheanáin descendant of Ailgheanán, 'noble offspring' Harkin Ó hEarcáin descendant of Earcán, a diminutive of earc, ‘red, speckled’ Heneghan Ó hÉineacháin descendant of Eidhneachán Higgins Ó hUiginn descendant of Uige, 'knowledge, skill' Jennings Mac Sheóinín son of little John Joyce Seoighe from Josse, a Breton saint's name Kearney Ó Cearnaigh / Ó Catharnaigh descendant of Cearnach, 'victorious' Kearns Ó Céirín descendant of Céirín — from ciar, black Keaveney Mac Géibheannaigh son of Géibheannach, 'fettered' Kerrigan Ó Ciaragáin descendant of Ciaragán — from ciar, black Killeen Ó Cillín descendant of Cillín, a pet form of Ceallach Langan Ó Longáin descendant of Longán, a diminutive of long, ‘tall’ Lavin Ó Láimhín a corruption of Ó Flaithimhín Lennon Ó Leannáin descendant of Leannán, 'lover' or 'sweetheart' Loftus Ó Lachtnáin descendant of Lachtnán, 'milk-white' Lydon Ó Lodáin descendant of Lodán Mangan Ó Mongáin descendant of Mongán, a diminutive of mongach, ‘hairy’ McAndrew Mac Aindriú son of Andrew McDaid Mac Daibhéid son of Davet, a diminutive of David McDonnell Mac Dónaill son of Dónall McFadden Mac Pháidín son of Páidín, 'little Patrick' McNulty Mac an Ultaigh son of the Ulsterman Moran Ó Móráin descendant of Mórán, 'the great one' Mullaney Ó Maoileanaigh descendant of Maolsheanaigh, ‘servant of St Seanach’ Mullarkey Ó Maoilearca descendant of the servant of St Earc Mulligan Ó Maolagáin descendant of Maolagán, 'the little tonsured one' Neary Ó Náradhaigh descendant of Náradach, 'good, noble' O'Dowd Ó Dubhda descendant of Dubhda, 'the dark' O'Flaherty Ó Flaithbheartaigh descendant of Flaithbheartach, 'bright ruler' O'Gara Ó Gadhra descendant of Gadhra, perhaps from gadhar, ‘a mastiff’ O'Malley Ó Máille descendant of Máille — 'noble chief' Patterson Mac Páidín son of Páidín, a pet form of Patrick Philbin Mac Philbín son of Philpin, a little Philip Prendergast de Priondargás from Brontegeest in Flanders Quigley Ó Coigligh descendant of Coigleach Raftery Ó Reachtabhra descendant of Reachtabhra — 'law' and 'fringe' Ronan Ó Rónáin descendant of Rónán, 'little seal' Rooney Ó Ruanaidh descendant of Ruanadh, 'the champion' Ruane Ó Ruadháin descendant of Ruadhán, a diminutive of ruadh, ‘red’ Seery Ó Saoraidhe a later form of Ó Síoghradha, descendant of Síoghraidh, the Norse Sigefrith Sloyan Ó Sluaghadháin descendant of Sluaghadhán, a diminutive of Sluaghadhach, ‘belonging to a host’ Tierney Ó Tighearnaigh descendant of Tighearnach, 'lordly' Tighe Ó Taidhg descendant of Tadhg, 'poet' Vaughan Ó Mocháin / Vaughan Welsh fychan, 'small' — adopted for Ó Mocháin Walsh Breathnach 'the Welshman' — soldiers who came with the Normans

Roscommon Ros Comáin — 53 names

Breen Ó Braoin descendant of Braon, 'sadness' or 'sorrow' Brennan Ó Braonáin descendant of Braonán, 'little drop / sorrow' Carty Ó Cárthaigh descendant of Cárthach, 'loving' Conlan Ó Conalláin / Ó Caoindealbháin descendant of Conallán — a diminutive of Conall Conroy Ó Maolchonaire descendant of Maolchonaire, 'follower of Conaire' Cummins Ó Cuimín descendant of Cuimín, a diminutive of cam, ‘bent’; or the Norman Comyn Dillon Diolún from de Leon Dolan Ó Dubhláin descendant of Dobhailen Donnellan Ó Domhnalláin descendant of Domhnallán, a diminutive of Domhnall, 'world-ruler' Duffy Ó Dubhthaigh descendant of Dubhthach, 'the dark one' Duignan Ó Duibhgeannáin descendant of Dubhgeannán, a diminutive of Dubhcheann, ‘black head’ Early Ó Maolmhochóirghe descendant of Maolmhocheirghe, ‘chief of early rising’ Fallon Ó Fallamhain descendant of Fallamhan, 'leader' Finnerty Ó Fionnachta descendant of Fionnachta, 'fair-snow' Flanagan Ó Flannagáin descendant of Flannagán, 'little red one' Flynn Ó Floinn descendant of Flann, 'ruddy' French de Fréins 'the Frenchman' Ganley Mag Sheanlaoich son of the old hero, from seanlaoch Garrahy Mag Fhearadhaigh son of Fearadhach, 'manly' Geraghty Mag Oireachtaigh son of Oireachtach, 'member of an assembly' Grogan Ó Gruagáin descendant of Gruagán — from gruag, hair, or grúg, fierceness Halligan Ó hAilleagáin descendant of Ailleagán, a diminutive of áille, ‘handsome, beautiful’ Hanley Ó hÁinle descendant of Áinle, 'beauty' or 'hero' Hayden Ó hEideáin descendant of Eideadhán, a diminutive of Eideadh Igoe Mac Iagó son of Iagó, a Spanish form of James Kelly Ó Ceallaigh descendant of Ceallach, 'bright-headed' or 'strife' Kenny Ó Cionnaith descendant of Cionnaith Keogh Mac Eochaidh son of Eochaidh — from each, 'horse' Kiernan Mac Tighearnáin son of Tighearnán, 'little lord' Lavin Ó Láimhín a corruption of Ó Flaithimhín Lenihan Ó Léanacháin descendant of Léanachán, 'mantled, cloaked' MacDermot Mac Diarmada son of Diarmaid Mannion Ó Mainnín descendant of Mainnín — perhaps the same as Mainchín Masterson Mac an Mháighistir son of the master, from máighistir (Latin magister) McCormack Mac Cormaic son of Cormac, 'charioteer' McDonagh Mac Donnchadha son of Donnchadh McManus Mac Mághnais son of Magnus — from Latin magnus, 'great' Molloy Ó Maolmhuaidh descendant of Maolmhuadh, 'noble chief' Monaghan Ó Manacháin descendant of Manachán, 'little monk' Mooney Ó Maonaigh descendant of Maonach Moran Ó Móráin descendant of Mórán, 'the great one' Mulhern Ó Maoilchiaráin descendant of the servant of St Ciarán Mullaney Ó Maoileanaigh descendant of Maolsheanaigh, ‘servant of St Seanach’ Mulvihill Ó Maoilmhichil descendant of the servant of St Michael Murray Ó Muireadhaigh / Mac Muireadhaigh descendant of Muireadhach, 'seafarer / lord' Naughton Ó Neachtain descendant of Neachtan — an old name linked to water Neary Ó Náradhaigh descendant of Náradach, 'good, noble' O'Connor Ó Conchobhair descendant of Conchobhar, 'lover of hounds' Rattigan Ó Reachtagáin descendant of Reachtagán, a diminutive of reacht, ‘law, decree’ Ring Ó Rinn descendant of Reann, ‘spear’ Shanley Mac Seanlaoich son of the old hero Sharkey Ó Searcaigh descendant of Searcach, 'loving' Tighe Ó Taidhg descendant of Tadhg, 'poet'

Sligo Sligeach — 36 names

Boland Ó Beólláin descendant of Beóllán Brennan Ó Braonáin descendant of Braonán, 'little drop / sorrow' Clifford Ó Clúmháin descendant of Clúmhán, from clúmhach, ‘hairy’; or Norman ‘de Clifford’, of Clifford in Herefordshire Coleman Ó Colmáin / Ó Clumháin descendant of Colmán, 'little dove' — from Latin columba Conway Ó Connmhaigh descendant of Connmhach Cummins Ó Cuimín descendant of Cuimín, a diminutive of cam, ‘bent’; or the Norman Comyn Cunningham Ó Connagáin descendant of Connagán, a diminutive of Conn Diskin Ó Díscín descendant of Díscín, a diminutive of díosc (apparently not a personal name) Durcan Mac Dhuarcáin son of Duarcán Early Ó Maolmhochóirghe descendant of Maolmhocheirghe, ‘chief of early rising’ Feeney Ó Fiannaidhe descendant of Fiannaidhe, 'soldier' Finn Ó Finn descendant of Fionn, 'fair' Gaffney Ó Gamhna descendant of Gamhain, 'calf' Gaughan Ó Gáibhtheacháin descendant of Gáibhtheachán, 'plaintive' Hart Ó hAirt descendant of Art, ‘bear, stone, noble’ Healy Ó hÉilidhe / Ó hÉalaighthe 'claimant' (Sligo) or 'ingenious' (Cork) Higgins Ó hUiginn descendant of Uige, 'knowledge, skill' Keaveney Mac Géibheannaigh son of Géibheannach, 'fettered' Lehane Ó Liatháin descendant of Liathán, 'grey' Loftus Ó Lachtnáin descendant of Lachtnán, 'milk-white' MacDermot Mac Diarmada son of Diarmaid McDonagh Mac Donnchadha son of Donnchadh Mooney Ó Maonaigh descendant of Maonach Morrissey Ó Muirgheasa descendant of Muirgheas, 'sea-choice' Muldoon Ó Maoldúin descendant of Maoldúin, ‘chief of the fort’ Mullaney Ó Maoileanaigh descendant of Maolsheanaigh, ‘servant of St Seanach’ Mullarkey Ó Maoilearca descendant of the servant of St Earc Murtagh Mac Muircheartaigh son of Muircheartach, 'sea-director, navigator' O'Connor Ó Conchobhair descendant of Conchobhar, 'lover of hounds' O'Dowd Ó Dubhda descendant of Dubhda, 'the dark' O'Gara Ó Gadhra descendant of Gadhra, perhaps from gadhar, ‘a mastiff’ O'Hara Ó hEaghra descendant of Eaghra of Luighne Quigley Ó Coigligh descendant of Coigleach Scanlon Ó Scannláin descendant of Scannlán — from scannal, 'contention' or 'strife' Spillane Ó Spealáin descendant of Spealán — from speal, a scythe Taaffe Táth from Welsh Dafydd (David)

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