Medieval Irish Origin Surnames

This is a list of surnames in which the origin is Medieval Irish. Irish is the Celtic language spoken in Ireland.

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Braden Irish
Anglicized form of Irish Ó Bradáin meaning "descendant of Bradán".

Brady Irish
Anglicized form of the Irish name Ó Brádaigh meaning "descendant of Brádach". A famous bearer is the American football quarterback Tom Brady (1977-).

Carey Irish
Anglicized form of Irish Ó Ciardha meaning "descendant of Ciardha".

Carran Irish
Variant of Curran.

Cary Irish
Variant of Carey.

Cassidy Irish
From Irish Ó Caiside meaning "descendant of Caiside". Caiside is a given name meaning "curly haired".

Collins 1 Irish
Anglicized form of Ó Coileáin. A famous bearer was Michael Collins, an Irish nationalist leader who was assassinated in 1922.

Cullen 2 Irish
Anglicized form of Ó Coileáin or Ó Cuilinn.

Curran Irish
Anglicized form of Irish Ó Corraidhín meaning "descendant of Corraidhín".

Gilchrist Scottish
From Gaelic MacGilleChrìosd meaning "son of Gille Críst".

Gilmore Scottish, Irish
Anglicized form of Scottish Gaelic MacGilleMhoire or Irish Gaelic Mac Giolla Mhuire meaning "son of the servant of Moire".

Gilmour Scottish, Irish
Variant of Gilmore.

Kilduff Irish
From the Irish Mac Giolla Dhuibh meaning "son of the black-haired man".

Kilpatrick Irish
From the Irish Mac Giolla Phádraig meaning "son of the servant of Saint Patrick".

MacBride Irish
Anglicized form of Mac Giolla Bhrighde.

MacClellan Irish, Scottish
Variant of McClelland.

MacClelland Irish, Scottish
Variant of McClelland.

MacGillEain Scottish Gaelic
Scottish Gaelic form of McLean.

MacGilleChrìosd Scottish Gaelic
Scottish Gaelic form of Gilchrist.

MacGilleFhaolain Scottish Gaelic
Scottish Gaelic form of McClelland.

MacGilleMhoire Scottish Gaelic
Scottish Gaelic form of Gilmore.

Mac Giolla Bhrighde Irish
Means "son of the servant of Brighid" in Irish.

Mac Giolla Dhuibh Irish
Irish Gaelic form of Kilduff.

Mac Giolla Eoin Irish
Irish Gaelic form of McLean.

Mac Giolla Fhaoláin Irish
Irish Gaelic form of McClelland.

Mac Giolla Mhuire Irish
Irish Gaelic form of Gilmore.

Mac Giolla Phádraig Irish
Irish Gaelic form of Kilpatrick.

MacLean Scottish
Variant of McLean.

Mac Síthigh Irish
Irish Gaelic form of McSheehy.

McBride Irish
Anglicized form of Mac Giolla Bhrighde.

McClain Scottish
Variant of McLain.

McClellan Irish, Scottish
Variant of McClelland.

McClelland Irish, Scottish
From Gaelic Mac Giolla Fhaoláin meaning "son of the servant of Faolán".

McLain Scottish
Variant of McLean.

McLean Scottish
Anglicized form of Gaelic MacGillEathain or MacGillEain meaning "son of the servant of Eòin".

McSheehy Irish
Anglicized form of Irish Gaelic Mac Síthigh, meaning "son of Sítheach".

Mohan Irish
Anglicized form of Irish Ó Mocháin meaning "descendant of Mochán".

Monday 3 Irish
Anglicized form of Mac Giolla Eoin. The last part of the surname was mistakenly taken as the Gaelic word for "Monday", Luain.

Moon 3 Irish
Variant of Mohan.

Nolan Irish
Anglicized form of Irish Ó Nualláin meaning "descendant of Nuallán".

Ó Brádaigh Irish
Irish Gaelic form of Brady.

Ó Bradáin Irish
Irish Gaelic form of Braden.

Ó Caiside Irish
Irish Gaelic form of Cassidy.

Ó Ciardha Irish
Irish Gaelic form of Carey.

Ó Coileáin Irish
Means "descendant of Coileán" in Irish.

Ó Corraidhín Irish
Irish Gaelic form of Curran.

Ó Mocháin Irish
Irish Gaelic form of Mohan.

Ó Nualláin Irish
Irish Gaelic form of Nolan.

Orman Irish
Anglicized form of Ó Ruaidh.

Ormond Irish
Anglicized form of Ó Ruaidh.

Ormonde Irish
Anglicized form of Ó Ruaidh.

Ó Ruaidh Irish
Means "descendant of Ruadh" in Irish.

Ó Sluaghadháin Irish
Irish Gaelic form of Sloan.

Sheehy Irish
Variant of McSheehy.

Sloan Irish
From Irish Ó Sluaghadháin meaning "descendant of Sluaghadhán".

Sloane Irish
Variant of Sloan.