REGISTER OF CLANS

The Register of Clans 2024

Clans who wish to apply to be included in the Register of Clans must complete a registration form. To receive a form please contact treasurer@clansofireland.ie 

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

Email: johnboyle2503@gmail.com 

Location of Historical Clan Territories: Derry & Donegal

Cartys of Connaught

Contact: Thomas Carty

Email: tcarty@live.ie 

Location of Historical Clan Territories: Clann Cathail in north County Roscommon.

 

Contact: Stephen Cassidy, Chieftain

Email: stephen@cassidyclan.org

Website: www.cassidyclan.org

Location of Historical Clan Territories: The origin of the Cassidy Clan is in the region of Lower Lough Erne, Co. Fermanagh in Ulster. Cassidys are
recorded as physicians to the Maguires between 1300 and 1600, and were also found practicing in the midlands of Ireland.  Cassidys also served as priests and scholars in the Diocese of Clogher. The Cassidy’s are closely associated with the ancient monastery of Devenish Island founded by St. Maolaise in the 6th century and famous for its 12th century round tower and ruined Augustinian abbey.

Connolly – Ó Conghaile

 

CONTACT:  Bart Connolly

EMAIL: finteoconghaile@gmail.com

Location of Historic Clan Territories: Galway & Mayo

 

Egan – Mac Aodaghain

Contact: Katrina Egan Costello
E-mail: katrinaegancostello@gmail.com
Website: www.clanegan.org
Location of Historic Clan Territories:  Tipperary, Offaly, Leitrim, Meath and Westmeath

Fitzpatrick / Mac Gilpatrick of the tribe of Cas – Mac Giolla Phádraig Dál gCais

 

Contact: Karen Fitzpatrick Hall

E-mail: karidancer@aol.com

Website: www.fitzpatrickclan.org

Location of Historic Clan Territories: Clare, Mayo & Roscommon

Fitzpatrick / Mac Gilpatrick of Leinster – Mac Giolla Phádraig Laighean

 

Contact: Dr. Michael George Fitzpatrick

E-mail: admin@fitzpatrickclan.org

Website:  www.fitzpatrickclan.org

Location of Historic Clan Territories: Carlow, Kildare & Louth

Fitzpatrick –

O’Mulpatrick of Breifne – Ó Maol Phádraig Bréifne

Contact: Matthew Fitzpatrick

Email: matt@fitzpatrickclan.org

Website: www.fitzpatrickclan.org

Hackett of Leinster – Ó hAicéad Laighean

 

Contact: Cav. Uilliam Ó hAicéad   GCEG. MSt.J. FSAScot. BB.

Email: haicead@aol.com 

Website: http://haicead.wix.com/clan-ohaicead-

Location of Historic Clan Territories: The Hacketts (of Norman origin) settled in Leinster in the 12th Century in Kildare, Kilkenny, Dublin, Wicklow and Carlow.

Joyce of Joyce Country – Seoigh Duthaigh Seoghach

 


Contact: Mr. Laurie Joyce

Email:  laurie.joyce@outlook.com

Website: www.tribejoyce.com/

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

Email: brianfrancis.mccabe@gmail.com

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

 

Contact: Steven McCarty, Albany/Berkeley, California, USA

Email:  smccarty@berkeley.edu

Mac Curtin of Thomond – Mac Curtáin Thuamhumhan

 

Contact: Mr. Dan Curtin

Email:  curtinclan@gmail.com

Website: www.curtin.org

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

 

Contact: Mayor Jamie McGarvey

Email: jg1mcgarvey@gmail.com

Website: www.mcgarveyseptsofulster.com

Location of Historic Clan Territories: The McGarvey Mac Gairbhith Septs Association currently represents the following Clans: Ó Gairbhith of Donegal, Mac Gairbhith of Armagh, Garvey, Ó Gairbhith.

Mac Ginley of Donegal – Mag Fhionnghaile Dhún na nGall

 

Contact: Proinsias Mag Fhionnghaile

Email: eolas@mcginleyclan.org

Website: www.mcginleyclan.org

Location of Historic Clan Territories: Mac Ginley Clan Mag Fhionnghaile is a Donegal Clan claiming descent from one who was “fair” or “valorous”.

Mac Grath of Ulster – Mac Craith Ulaidh

Contact: Seán Alexander McGrath 
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 Hale of Co. Mayo – Mac hÉil Condae Mhuigheo

 

Contact: Kathleen Blanchard 

Email: kathb78@gmail.com

Website: https://mchaledna.com/

Location of Historic Clan Territories: Mayo

Mac Laughlin of Donegal – Mac Lochlainn Dún na nGall

 

Contact: Conor Brian McLaughlin

Email: conormclaughlin@mailbox.org

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)

Email: mcmullenjordan@hotmail.com

Secondary Contact: Sinead McMullen (Registrar, Clan Mac Maoláin Association)

Email: sineadkmcmullen@gmail.com

Website: www.macmaolain.com

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.

Mac Shane – Mac Seáin

Contact: Jameson Johnson McShane

Email: clanmcshane@yahoo.co.uk

Website: www.clanmcshane.org

Location of Historic Clan Territories: Mac Shane Mac Seáin is equivalent to Johnson. In Ulster and Louth the Mac Shanes are a cadet branch of the O’Neills.

Mc Carty – Mac Carthaigh

Contact:  Steven McCarty

Email: smccarty@berkeley.edu 

Location of Historical Clan Territories: Munster, Desmond and Cork.

 

McGillycuddy of the Reeks

 

Contact: Michael McGillycudddy esq.

Email: mcgillycuddy01@gmail.com

Email: pjmcq1@hotmail.com

Location of Historical Clan Territories: County Antrim, Ulster.

Mannion of Soghan – Ó Mainnín Soghain

 

Contact:  Dr. Joe Mannion

Email:   joe@mannionclan.org 

Website:   www.mannionclan.org

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.


Monaghan – Manachain

Contact: Kevin Monaghan

Email: kmonaghan100@gmail.com

Nolan – Ó Nualláin

 

Contact: Christopher A Nolan III

Email: chrisanolan3@gmail.com

Website: https://nolanfamilies.org/

Facebook: https://www.facebook.com/groups/1314731821884826

DNA Projecthttps://www.familytreedna.com/groups/nolan/about

Location of Historical Clan Territories: Carlow / Galway

O’Boylan of Darty – Ó Baoighealláin

Contact: Mr. Peter Boylan

Email: peter@boylan.de

Website: http://www.boylan.de/

Location of Historical Clan Territories: Thee Boylans are a sept of Darty (County Monaghan). Before being subdued by the MacMahons of Oriel they were influential from Fermanagh to Louth.

O’Brosnan of Brosna – Ó Brosnacháin Brosnach

 

Contact: Mr. Paul Brosnan

Email: brosnan01@gmail.com 

Clan website: www.obrosnanclan.ie

Location of Historical Clan Territories: The Boylans are a sept of Darty (County Monaghan). Before being subdued by the MacMahons of Oriel they were influential from Fermanagh to Louth.

O’Byrne of Leinster – Ó Broin Laighean

 

Contact: Dr. Emmett O’Byrne, Hon. Chief

Email: emmettobyrne@gmail.com

Website: www.clanobyrne.com

Location of Historical Clan Territories: O’Byrne Ó Broin is a foremost clan in east Leinster, prominent in Irish history, especially in the resistance to English conquest.

Ó Ceallaigh Dal gCas

 

Contact: Gearóid O Ceallaigh

Email: info@oceallaigh.ie

 

O’Colman – Ó Colmáin Uí Fiachrach Muaidhe

 

Contact: Eoín Baiste O Colmáin

Email : ebocolmain@gmail.com or lagnie127@aol.com 

Facebook Page: https://www.facebook.com/irishcolemans/

Location of Historical Clan Territories: Sligo

O’Crowley of Cork – Ó Cruadhlaoich Corcaigh

 

Contact: James Crowley

Email: oreillycrowley@gmail.com

Website: www.crowleyclan.com

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 

Email: shanej.odea@gmail.com

Website: www.odeaclan.org

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’Donnell Clan Association

Contact: Amb. (ret.) Francis M. O’Donnell

Email: framarodo@aol.com

Website: https://odomhnaill.com/

Location of Historical Clan Territories: The territory over which the O’Donnells of Tyrconnell historically held sway varied from a heartland identified today as County Donegal, to other areas of north-west Ulster, lower
Connaught, and north-west Leinster, in the 15th and 16th centuries. 

Sovereignty: Donegal town, Bannagh, Boylagh, Kilmacrenan,
Lough Eske, Lifford, Raphoe, Tirhugh;

Suzerainty: Carbury, Coole, Dartry, Firlurg, Inishowen,
Magheraboy, Oirgialla, Sligo;

Vassal allegiance: Derry, Coleraine, Lower Connaught, River Bann.

[Sources: Annals of 4 Masters; Keating; Dineen; Lewis; Lynch; Simms; Mac Eiteagain; O’Donnell]

 

O’Dowd  – Ó Dubhda

Contact: Colum O’Dowd

E-mail:   columodowd@gmail.com

Website: www.odubhdaclan.com

Location of Historic Clan Territories: Sligo & North-Mayo

O’Driscoll of Corca Laoidhe – Ó hEidersceoil Corcu Loígde

 

Contact:  Rich Driscoll

Email: rich@richdriscoll.us

Website: www.odriscoll.ie

DNA Project Administrator: Susan Barretta, FCGS 

DNA Project Email: driscolldna@pobox.com

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 

Email: johncfarrell@eircom.net

Website: www.farrellclan.ie 

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 

Email: granuaile1954@yahoo.com

Website: http://clanflanagan.org

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

Email: rob.ohalloran@yahoo.co.uk

Location of Historical Clan Territories: Clare, Tipperary & Limerick

 

O’Hosey – Hussey

Contact: Robert B. Hosey

Email: hoseyclan@aol.com 

Website: www.clanhosey.org 

 

O’Lafferty of Tyrone – Ó Laithbheartaigh Tír Eoghain

 

Contact: Jamie Lafferty Richey

Email: jamie.richey@icloud.com

Website: www.clanlafferty.org

Location of Historical Clan Territories: O’Lafferty Ó Laithbheartaigh are a clan of Ulster described in the Annals of the Four Masters as the “Tanists of Tyrone”.

O’Malley Clan – Clann Ó Máille

 

Contact: Mr. Don O’Malley

E-mail: omalleyclanireland@gmail.com

Website: www.omalleyclan.ie

Location of Historical Clan Territories: Mayo, Galway & Limerick

O’Mordha / O’Moore / Moore of Leinster

 

Contact: John Moore, Honorary Clan Chieftain

Email: jmoore_dub@yahoo.co.uk

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

Email: mulvihillvoice@hotmail.com

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

Email: sean@oneill.ie

Website: www.oneillclans.com

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

Email: conosullivan11@gmail.com

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

Email: anotighearnaigh@gmail.com

Website: http://tierneyclans.weebly.com/

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).

 

Poole 

 

Contact: Mr. Darren Poole

Email: dpoole79@live.com

Website: www.clanpoole.org

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.

Quigley of Connacht – Ó Coigligh

 

Contact: Michael J Quigley

E-mail:   michael.j.quigley1970@gmail.com

Location of Historic Clan Territories: Roscommon, Sligo, Mayo

Redfern

Contact: Mellissa Livermore (nee Redfern)

Email: mj.livermore@bigpond.com

Lydon

Contact: Dr. Donal Lydon

Email: donallydon674@gmail.com

Walker – Mac Siúbhlaigh

Contact: Christopher John Walker

Email: clanwalkerinfo@gmail.com