What Irish surnames start with N?

Naughton, Nolan, Noonan, Nugent.

Where do Irish surnames beginning with N come from?

The homelands most often attached to these names are Tyrone, Armagh, Donegal, Galway. Of the 8 listed here, 7 are Gaelic in origin and 1 Norman.

A B C D F G H J K L M N O P Q R S T W

Naughton Ó Neachtain descendant of Neachtan — an old name linked to water Galway · Clare · Roscommon Nolan Ó Nualláin descendant of Nuallán, 'famous, noble' Carlow · Wexford Noonan Ó Nuanáin descendant of Ionmhaineán, 'the beloved' Cork · Limerick Nugent Nuinseann from Nogent in France Westmeath · Cavan

Naughton · Ó Neachtain · Gaelic sept
Descendant of Neachtan — an old name linked to water. Two septs: a Dalcassian family of Inchiquin in Clare, kin to the Quinns, and the chiefs of Maenmagh around Loughrea in Galway, broken by the Norman conquest of Connacht.
Nolan · Ó Nualláin · Gaelic sept
Descendant of Nuallán, 'famous, noble'. Princes of Foharta, Carlow's ancient people, with the hereditary right to knight the king of Leinster. Brian O'Nolan wrote as Flann O'Brien, twentieth-century Ireland's funniest pen.
Noonan · Ó Nuanáin · Gaelic sept
Descendant of Ionmhaineán, 'the beloved'. The 'beloved' sept of north Cork, erenaghs of Tullylease where their carved saint's slab, 'pray for Berechtuine', has been prayed over since the 8th century.
Nugent · Nuinseann · Norman
From Nogent in France. Barons of Delvin and earls of Westmeath; exiled branches gave Austria a field marshal (Laval Nugent) and gave the Empress Maria Theresa some of her best Irish 'Wild Geese' officers.

These are listed on the atlas under another spelling, but the N form is the one many families carry.

Nally Mac Con Allaidh listed as McNally Nelis Mac Niallais listed as McNelis Nulty Mac an Ultaigh listed as McNulty Neill Ó Néill listed as O'Neill

Not here? The list grows by suggestion. Tell us the name and the county it belongs to — a source is welcome but not required.