Irish surnames A to Z

• Irish surnames starting with A · 5 names
  Adams (Mac Ádhaimh), Agnew (Ó Gnímh), Ahern (Ó hEachthighearna), Archer (Áirséir)
• Irish surnames starting with B · 28 names
  Barrett (Bairéid), Barry (de Barra), Beattie (Biadhtach (source)), Behan (Ó Beacháin)
• Irish surnames starting with C · 67 names
  Cafferty (Mac Eachmharcaigh), Cagney (Ó Caingne), Cahill (Ó Cathail), Callan (Ó Cathaláin)
• Irish surnames starting with D · 43 names
  Daly (Ó Dálaigh), Darcy (Ó Dorchaidhe / d'Arcy), Davoren (Ó Duibhdábhoireann), Deasy (Déiseach)
• Irish surnames starting with F · 28 names
  Faherty (Ó Fathartaigh), Fahy (Ó Fathaigh), Fallon (Ó Fallamhain), Farley (Ó Faircheallaigh)
• Irish surnames starting with G · 27 names
  Gaffney (Ó Gamhna), Gallagher (Ó Gallchobhair), Galvin (Ó Gealbháin), Garrahy (Mag Fhearadhaigh)
• Irish surnames starting with H · 32 names
  Hallinan (Ó hAilgheanáin), Halpin (Ó hAilpín), Hamill (Ó hÁdhmaill), Hanley (Ó hÁinle)
• Irish surnames starting with J · 4 names
  Jenkins (— (Welsh / Cornish name)), Jennings (Mac Sheóinín), Johnston (Mac Seáin (sometimes)), Joyce (Seoighe)
• Irish surnames starting with K · 36 names
  Kavanagh (Caomhánach), Kealy (Ó Caollaidhe), Keane (Ó Catháin), Kearney (Ó Cearnaigh / Ó Catharnaigh)
• Irish surnames starting with L · 22 names
  Lalor (Ó Leathlobhair), Larkin (Ó Lorcáin), Laverty (Ó Laithbheartaigh), Lavin (Ó Láimhín)
• Irish surnames starting with M · 110 names
  MacDermot (Mac Diarmada), MacNamara (Mac Conmara), Madden (Ó Madáin), Madigan (Ó Madagáin)
• Irish surnames starting with N · 11 names
  Naughton (Ó Neachtain), Nealon (Ó Nialláin), Neary (Ó Náradhaigh), Nevin (Mac Cnáimhín)
• Irish surnames starting with O · 172 names
  O'Brien (Ó Briain), O'Callaghan (Ó Ceallacháin), O'Connell (Ó Conaill), O'Connor (Ó Conchobhair)
• Irish surnames starting with P · 7 names
  Philbin (Mac Philbín), Plunkett (Pluincéid), Power (de Paor), Prendergast (de Priondargás)
• Irish surnames starting with Q · 6 names
  Quigley (Ó Coigligh), Quinlan (Ó Caoindealbháin), Quinn (Ó Cuinn)
• Irish surnames starting with R · 16 names
  Rafferty (Ó Raithbheartaigh), Raftery (Ó Reachtabhra), Redmond (Réamonn), Regan (Ó Riagáin)
• Irish surnames starting with S · 26 names
  Savage (Sábhaois), Scanlon (Ó Scannláin), Scully (Ó Scolaidhe), Sexton (Ó Seasnáin)
• Irish surnames starting with T · 17 names
  Taaffe (Táth), Taggart (Mac an tSagairt), Thompson (Mac Thómais), Tierney (Ó Tighearnaigh)
• Irish surnames starting with W · 8 names
  Wall (de Bhál), Wallace (de Bhailís), Walsh (Breathnach), Ward (Mac an Bhaird)

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