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Home ›Register of Clans 2022
Clans who wish to apply to be included in the Register of Clans should register online here
Clans not included on the Register of Clans have not registered/renewed their membership for the current year. We await contact from these clans and individuals who are interested in organising a clan.
Clans are listed according to the most common English version of the surname followed by the original Irish version. Please note that individual Clan Societies may differ in the spelling variations they use in English and Irish and that where appropriate we have used the original prefix of O' and Mac but these are not always used with every variant of each Clan name or can sometimes be used differently e.g. Mc, Mac, Mag, M' etc.
- Carty of Connaught – Ó Carthaigh Connacht
- Connolly – Ó Conghaile
- Giffin of Ulster - Mag Dhuibhfinn Ulaidh
- Fitzpatrick of Upper Ossory
- Fitzpatrick / O'Mulpatrick of Breifne – Ó Maol Phádraig Breifne
- Fitzpatrick / Mac Gilpatrick of the tribe of Cas – Mac Giolla Phádraig Dál gCais
- Fitzpatrick / Mac Gilpatrick of Leinster – Mac Giolla Phádraig Laighean
- Fitzpatrick / Mac Gilpatrick of Ulster – Mac Giolla Phádraig Ulaidh
- Hackett of Leinster – Ó hAicéad Laighean
- Hoban of Cenél Eoghain – Ó hÚbáin Cenél Eoghain
- Joyce of Joyce Country – Seoigh Duthaigh Seoghach
- Joyce of Ulster
- Mac Cabe of Breffny – Mac Cába Breffny
- Mac Carty – Mác Cárthaigh
- Mac Curtin of Thomond – Mac Curtáin Thuamhumhan
- Mac Garvey of Ulster – Mac Gairbhith Ulaidh
- Mac Ginley of Donegal – Mag Fhionnghaile Dhún na nGall
- Mac Grath of Ulster – Mac Craith na Uladh
- Mac Hale of Co. Mayo – Mac hÉil Condae Mhuigheo
- Mac Kenna of Truath – Mac Cionaoith
- Mac Laughlin of Donegal – Mac Lochlainn Dún na nGall
- Mac Mullen – Mac Maoláin
- Mac Shane – Mac Seáin
- McGillycuddy of the Reeks
- Malpass – Malpas
- Mannion of Soghan – Ó Mainnín Soghain
- Monaghan – Ó Manacháin
- Mulqueen of Ballymulqueeny – Ó Maolchaoin Baile-Ui-Maolchaoine
- Nolan – Ó Nualláin
- O'Boylan of Darty – Ó Baoighealláin
- O'Brosnan of Brosna – Ó Brosnacháin Brosnach
- O'Byrne of Leinster – Ó Broin Laighean
- O'Carroll of Oriel – Ó Cearbhaill Oirialla
- Ó Ceallaigh Dal gCais - Uí Mhaoil Cheallaigh Dál gCais
- O'Cleary of Co. Donegal – Clann Uí Chléirigh
- O'Colman – Ó Colmáin Uí Fiachrach Muaidhe
- O'Crowley of Cork – Ó Cruadhlaoich Corcaigh
- O'Dea of Dysert – Ó Deághaidh Dísert
- O'Donnell of Tyrconnell – Ó Domhnaill Tír Chonaill
- O'Driscoll of Corca Laoidhe – Ó hEidersceoil Corcu Loígde
- O'Farrell of Annaly – Ó Fearghail Angaile
- O'Flanagan – Ó Flannagáin
- O'Gara of Coolavin – Ó Gadhra Cúil Ó bhFinn
- O'Higgins of Ballynary
- O'Hosey of Fermanagh – Ó hEodhusa Fhear Manach
- O'Lafferty of Tyrone – Ó Laithbheartaigh Tír Eoghain
- O'Lalor of Leix – Ó Leathlobhair Laoise
- O'Mahony Society - Muintir Mhathúna
- O'Malley Clan – Clann Ó Máille
- O'Mordha / O'Moore / Moore of Leinster
- O'Mulvihill of Connacht
- O'Neill – Ó Neill
- O'Sullivan of Munster – Ua Súileabháin Mhumhain
- O'Tierney – Ó Tighearnaigh
- Poole
- Redfern
- Roche
- Walker – Mac Siúbhlaigh