REGISTER OF CLANS
The Register of Clans 2023
Clans who wish to apply to be included in the Register of Clans must complete a registration form. To receive a form please contact email@example.com
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.
For new (first-time) clans seeking membership and registration, the following fees apply:
Initial Non-Refundable Application Fee: €50.00 (Euro)
Registration & First Year Subscription Fee: €200.00 (Euro). Payable upon acceptance by the registration committee for registration and membership. This fee includes a €125.00 (Euro) registration fee and first year annual subscription of €75.00 (Euro). The membership year runs from 1st January to 31st December. The annual subscription is due at the time when the registration process is complete within the membership year. Thereafter, the annual subscription fee is due each January following first registration.
Annual Subscription: €75.00 (Euro)
Boyle – Ó Baoighill / Ó Baoill
Contact: John J Boyle
Location of Historical Clan Territories: Derry & Donegal
Cartys of Connaught
Contact: Thomas Carty
Location of Historical Clan Territories: Clann Cathail in north County Roscommon.
Connolly – Ó Conghaile
Hackett of Leinster – Ó hAicéad Laighean
Joyce of Joyce Country – Seoigh Duthaigh Seoghach
Contact: Mr. Laurie Joyce
Location of Historic Clan Territories: The Joyces are a family who are believed to have come to Ireland from Wales around the end of the twelfth century. They became hibernicized and by the sixteenth century had acquired much land in West Connacht in a mountainous area generally referred to as Joyce Country. They are recognized as having been one of the fourteen Tribes of Galway.
Mac Cabe of Breffny – Mac Cába Breffny
Contact: Mr. Brian McCabe
Location of Historic Clan Territories: The Mac Cabes (Clann Cába) were a strong Gallowglass Clan who first appear in the Irish Annals in 1358 and who, by 1424, were recognised as Constables of the two Breffneys (Cavan and Leitrim), Fermanagh and Oriel (Monaghan).
Mac Carty – Mác Cárthaigh
Mac Curtin of Thomond – Mac Curtáin Thuamhumhan
Contact: Mr. Dan Curtin
Location of Historic Clan Territories: This clan originates in Thomond but later was found in Cork. Up to the end of the 16th century the English version of the name was MacCruttin. In the census of 1659 in Counties Cork, Kerry and Limerick similar sounding names such as Mac Curatine and O’ Curataine were treated as synonymous although they are not the same clan.
Mac Garvey of Ulster – Mac Gairbhith Ulaidh
Mac Grath of Ulster – Mac Craith Ulaidh
DNA Project: www.familytreedna.com/groups/mc-grath/about
Location of Historic Clan Territories:
The lands of Termonmagrath and Termonamongan collectively known as Termondavog were held by the Clan McGrath since at least the early 13th Century, when they Annals first mention the death of the Corab of the great medieval pilgrimage islands of Lough Derg, the Mac Craith of the Termon in 1290. The Termon created a buffer between the lands of the Gaelic Lords O’Donnell of Donegal (Tyrconnell) to the west, O’Neill of Tyrone to the east and Maguire of Fermanagh to the south. The Termon was protected under Irish Brehon law and fell under the physical protection of the Clan McGrath, as did the monastery located on Saint’s Island within the Lough.
Mac Kenna of Truath – Mac Cionaoith
Mac Laughlin of Donegal – Mac Lochlainn Dún na nGall
Contact: Conor Brian McLaughlin
Location of Historic Clan Territories: Mc Laughlin of Donegal – Mac Lochlainn Dún na nGall are a senior branch of the Northern Uí Néill and a leading sept of Tirconnell who’s seat was originally at Inishowen.
Mac Mullen Leinster – Maoláin agus Mac Maoláin
Main Contact: Jordan McMullen (Director, Clan Mac Maoláin Association)
Secondary Contact: Sinead McMullen (Registrar, Clan Mac Maoláin Association)
Location of Historic Clan Territories: Baronies of Morgallion, Lune, Lower Kells and Duleek Co. Meath.
Maoláin and Mac Maoláin families of Leinster are descended from a family recorded in the Annals as Chieftains of Luighne and Gaileanga, plus the charter section of the ‘Book of Kells’ as laity columcille (Ceannanus Meath);
BK P139 (c.1037 based on participants): King of Tuath Luighne, Laignen Mac Moelain, of the laity (columcille).
M1050.9 Maelan, lector of Ceanannus, who was a distinguished sage died.
T1065.5 Leochan son of Mac Maoláin, king of the Gailenga, was slain by Conchobhar O Maolseachlainn.
M1076.1 Amhlaib, mac mic Maoláin, king of Gaileanga.
M1144.14 Mac Mic Maoláin, tigherna Gaileang Breagh, do mharbhadh.
M1144.14 The son of Mac Maoláin, lord of Gaileanga-Breagh, was killed.
Mc Carty – Mac Carthaigh
Contact: Steven McCarty
Location of Historical Clan Territories: Munster, Desmond and Cork.
McGillycuddy of the Reeks
Mannion of Soghan – Ó Mainnín Soghain
Contact: Dr. Joe Mannion
Location of Historic Clan Territories: The Mannion Clan descend from Mainnín son of Flannabra, a tenth-century king of the Sogain people who dwelt in modern-day East Galway in medieval times. Mainnín was a direct descendant of an Ulster prince called Sogan Sálbuide son of Fiacha Araide, the 37th king of Ulster. Fiacha Araide and his descendants, the Dál nAraide, are depicted by the medieval Irish genealogists as having belonged to the Cruthin, an early band of settlers deemed to have reached Ireland about 600 BC.
The origin legend of the Sogain of East Galway informs us that their progenitor Sogan Sálbuide migrated from Ulster to Connacht, where the legendary Queen Medb granted him an extensive territory between the Clare river and the Suck, where he and his followers settled. This was the ancient tuath or kingdom of Sogan, over which the Ó Mainnín Clan ruled as kings and later as chiefs until the end of the Gaelic era in the seventeenth century.
The Ó Mainnín surname first appears in the Irish annals in 1135, when ‘Ó Mainnín, king of Sogan’ was slain at the battle of Áenach Máenmaige to the east of Loughrea. The tomb of the last known chief of the name of the Mannion Clan, John son of Melaghlin, can be seen in the impressive ruins of Kilconnell Abbey near Ballinasloe, where it is marked by an inscribed grave slab dated 1648.
O’Brosnan of Brosna – Ó Brosnacháin Brosnach
O’Byrne of Leinster – Ó Broin Laighean
O’Crowley of Cork – Ó Cruadhlaoich Corcaigh
Contact: James Crowley
Location of Historical Clan Territories: O’Crowley Ó Cruadhlaoich derive their name from the Irish for hard (cruadh) hero (laoch). The clan originate in Moylurg in Connacht but migrated to West Cork where they became a leading clan.
O’Dea of Dysert – Ó Deághaidh Dísert
Contact: Mr. Shane O’Dea
Location of Historical Clan Territories: O’Dea Ó Deághaidh Dísert is a Dalcassian clan based around their main seat at Dysert (Co. Clare). O’Dea is a name associated almost exclusively with the County Clare and the areas such as Limerick City and North Tipperary which immediately adjoin it. It is not a common name anywhere and even in County Clare is not numerous outside the part of the county where it originated. This is indicated by the place names Tully O’Dea and Dysert O’Dea, the site of a famous battle in 1318. The head of the clan was chief of a considerable territory comprising much of the Barony of Inchiquin.
O’Driscoll of Corca Laoidhe – Ó hEidersceoil Corcu Loígde
Contact: Rich Driscoll
DNA Project Administrator: Susan Barretta, FCGS
DNA Project Email: firstname.lastname@example.org
DNA Project Website: http://www.familytreedna.com/groups/driscoll
Location of Historical Clan Territories: O’Driscoll Ó hEidersceoil is an Anglicized form of the Gaelic Ó hEidirsceóil which is has the meaning of “diplomat” or “interpreter.” The clan were based in Corcu Laídge where they were Kings.
O’Farrell of Annaly – Ó Fearghail Angaile
Contact: John C Farrell
Location of Historical Clan Territories: O’Farrell Ó Fearghail means “man of valour”. This clan were numerous and important in Annaly and had their chief seat at Longford which was known as Longphort Uí Fhearghail (O’Farrell’s fort).
O’Flanagan – Ó Flannagáin
Contact: Granuaile O’Flanagan
DNA Project Link: https://www.familytreedna.com/groups/flanagan-2/about
Location of Historical Clan Territories: Flanagan is the name of at least five distinct and unrelated Irish Clans. Flanagan of TuathRatha (Fermanagh), Flanagan of Clann Chathail (Roscommon), Flanagan of Comair and Teffia (Westmeath), Flanagan of Cinel Arga (Offaly). All of these clans are represented by the Flanagan Clans Society.
O’Halloran – Ó hAllmhuráin / Ó hAlluráin
Contact: Robert O’Halloran
Location of Historical Clan Territories: Clare, Tipperary & Limerick
O’Higgins of Ballynary
Contact: Karl O’Higgins
Location of Historical Clan Territories: O’Higgins Ó hUigin is a clan which claims descent from Cenél Fiachach a branch of the Southern Uí Néill. The Clan were initially settled in the ancient Kingdoms of Brega and Mide before a branch migrated in the 12th century to Connacht. Principal seats were established in Westmeath at Kilbeg and in Sligo at Dooghorne, Monteige, and Ballynary.
O’Lafferty of Tyrone – Ó Laithbheartaigh Tír Eoghain
O’Mordha / O’Moore / Moore of Leinster
Contact: John Moore, Honorary Clan Chieftain
Location of Historical Clan Territories: The historical territory of the Uí Mhórdha (O’Moores) was primarily in Leix, now Co. Laois. There is an Irish language genealogy of the family written in the mid-17th century and is printed in the journal Analecta Hibernica (1951), no 18, p.140 [under pedigree no.1839) by a member of the genealogical-chronicler family, Ó Cléirigh. It is clear from this genealogy and other references (See ‘The Midland Septs of the Pale’ by F.R. Montgomery Hitchcock, 1908, pp 151) that the late medieval territory of the Uí Mhórdha stretched across Laois and Offaly, with the former sometimes referred to in 16th century English official correspondence as ‘O’Moore’s Country’. They were allied to the midland O’Conors and were displaced by the plantations of the midlands in the 1560s. They were present at the infamous massacre of Mullaghmast in 1578 which was perpetrated by English colonists during the plantation of Queens County (now Co. Laois). The ‘Laigis’ or Laigse were the early medieval population group who gave their name to Leix/Laois (previously Queens County), and they are often called ‘secht Laigse Lagen’ – the ‘seven Laigse of Leinster’. They were a powerful group and in the medieval period their chief lineage was the Uí Mhórdha/O’Moores. The family still held some position in the aftermath of the Cromwellian confiscations of the 1650s for we see that they are recorded as landowners in Laois, as recorded in the 1659 Census of Ireland (ed. Seamus Pender).
O’Mulvihill of Connacht
Contact: Mary Ann Mulvihill-Decker
Location of Historical Clan Territories: O’Mulvihill means ‘devotee of St. Michael’ and originates in Connacht where they were an important clan. The name has also evolved over the years to Mitchell.
O’Neill – Ó Neill
Contact: Seán O’Neill, The Association of O’Neill Clans
Location of Historical Clan Territories: (O) Neill Ó Néill is a surname that is numerous throughout Ireland especially in Tyrone and Antrim. The Association of O’Neill Clans was established in 2007 and represents the following O’Neill Clans: O’Neill of Tyrone, O’Neill of Fews, O’Neill of Clandaboy, O’Neill of Leinster i.e Carlow, and the O’Neill of Munster i.e. Decies and Thomond.
O’Sullivan of Munster – Ua Súileabháin Mhumhain
Contact: Conchobar O’Sullivan
Facebook Page: https://www.facebook.com/groups/osullivanclan
Location of Historical Clan Territories: O’Sullivan Ó Súieabháin originated in South Tipperary before they were forced Westward during the Anglo-Norman invasion where they became one of the leading clans of Munster Eoghanacht. There are a number of sub branches represented by the clan association including: O’Sullivan Mór, O’Sullivan Beare, O’Sullivan MacCragh, Mac Fineen Duff (extinct). The cadet clan of MacGillycuddy of Reeks evolved into a separate clan and are listed separately on the Register of Clans.
O’Tierney – Ó Tighearnaigh
Contact: Mr. Cathaoir Ó Tighearnaigh
Location of Historical Clan Territories: O’Tierney – Ó Tighearnaigh derived from the Gaelic word tighearnach meaning “lord” or “lordly”. Tighearnach, sometimes spelt Tigernaich or Tigernach or even Tignarach was a popular given name in ancient Ireland. The O’Tierney Clans Society was formed in 1990 to represent the following main septs of the name: O’Tierney Chiefs of Farney (Armagh), O’Tierney Chiefs and Lords of Ceara (Mayo), O’Tierney Kings of Bréaga, Fearran O’Tierney (Tipperary), O’Tierney of Corcu Modruad (Clare).
Contact: Mr. Darren Poole
Location of Historical Clan Territories: Clan Poole, a cadet branch and descendants of Mag Uidhir (Mcguire’s of Co Waterford and Fermanagh). Mag Uidhir also a cadet branch of their Parent house Clan Conla. There are Baptismal records of the Poole’s in Ireland from the 17th century.