Register of Clans 2017

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.

 

 

 

 

Burke – De Búrca

E-mail:     deburcararebooks@gmail.com

Contact: Mr Eamonn de Búrca, 27, Priory Drive, Blackrock, Co. Dublin.  A94 V406

Caomhánach Laighean

Caomhánach is a famous branch of the MacMurroughs. The name is said to have been adopted by the first Caomhánach having been fostered by a successor of St. Caomhan.  Over 200 interpretations of the Irish name Caomhánach are known, including Cavanagh, Kavanagh, Cavanaugh, Kavanaugh, etc.

 

Website: www.kavanaghfamily.com

Email: ferguslkavanagh@gmail.com

Contact: Mr. Fergus Kavanagh, 514 Orwell Park Way, Templeogue, Dublin 6W, Ireland.

 

 

Cassidy of Fermanagh – Ó Caiside Fhear Manach

A clan located in Fermanagh who provided Ollamhs and Physicians to the Maguires. In more recent
times members of this sept can be found in all parts of Ireland, although less so in Connacht.
 
Website: www.cassidyclan.org
Email: nuala@caiside.org
Contact: Mrs. Nuala Cassidy CIOM, 19B Meadowbrook, Tullygally, Craigavon, County Armagh, BT65 5AA, Northern Ireland.
 
 
 
 
 

Connolly – Ó Conghaile

CONTACT:  Bartle Ó Conghaile, Ballynaxos, Dunganstown, Brittas Bay West, Co Wicklow.

EMAIL: isaw@eircom.net

Dalton of Westmeath – de Dalatún

Dalton de Dalatún  was formerly spelt D'Alton. The Daltons were an Anglo Norman family who became

totally Hibernicized as an Irish Sept establishing their territory in County Westmeath. A branch also settled in

County Clare.

Website: www.daltongensoc.com

Email: howard.dalton@hotmail.co.uk

Contact: Mr. Howard Dalton, East Garden Cottage, South Lane, Thornton le Dale, Nth Yorkshire, England YO18 7QU.

Dixon – Mac Riocaird

CONTACT:-  Derek Dixon Byrne, 11C Cameron Court, Cork Street, Dublin 8
EMAIL:-  michaelgadixon@gmail.com
CLAN WEBSITE:- www.dixon.ie

Dorrough of Fermanagh – Ua Dubhdara Fhear Manach

Website: http://www.odubhdara.com/

E-mail: RichardDorrough@yahoo.com

Contact: Mr. Richard Dorrough, 303 N2nd Ave Mechanicville NY 12118

Fagan – Ó Faodhagáin

Website: http://clanfagan.com/

Email: webmaster@clanfagan.com or rick@kasparek.com

Contact: The Association of the Fagan Tribes c/o Mr. Rick (Fagan) Kasparek, 2512 Camarie Avenue, Midland, TX 79705.

FitzGerald of Co. Tipperary – Mac Gearailt Thiobraid Árann

FitzGerald of Co. Tipperary – Mac Gearailt Thiobraid Árann

Contact: Mr. Maurice Joseph FitzGerald III, J.D. Alabama, USA.

Email: mjf2258@me.com

Hackett of Leinster – Ó hAicéad Laighean

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

Contact: Cav. Uilliam Ó hAicéad   GCEG. MSt.J. FSAScot. BB.
Address: 10a Lefroy Street Coatbridge North Lanarkshire ML51PN Scotland

Website: http://haicead.wix.com/clan-ohaicead-
Email: haicead@aol.com
 

 

Healy of Munster – Ó hÉalaighthe Mhumhain  

Healy of Munster – Ó hÉalaighthe Mhumhain

Email: munsterhealyclan@gmail.com

Hoban of Cenél Eoghain – Ó hÚbáin Cenél Eoghain

(O) Hoban Clan Ó hÚbáin,  a branch of the Cenél Eoghain who settled in Co. Mayo.

From the 17th century a branch of the Hobans had settled in Co. Kilkenny.

Email: denisparnell@sympatico.ca

Contact: Baron Denis A. Hoban, 1930 Lawerance Ave West, Toronto Ontario, M9N-1H2, Canada.

 

 

 

Joyce of Joyce Country – Seoigh Duthaigh Seoghach

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.

Website: www.tribejoyce.com/

Email: Laurie@TribeJoyce.com and laurie.joyce2@bigpond.com

Contact: Mr. Laurie Joyce, 9 Fieldstone Crescent, Cranbourne North, VIC 3977, Australia. 

Keohanes of West Cork – Ó Ceocháin

Keohanes Ó Ceocháin of West Cork is a small sept peculiar to West Cork, a branch of the
Crowleys (Ó Cruadlaoich). In past centuries the surname was Crowley Keohane or Crowley Cohane, but in later years the primary surname was dropped and Keohane is now the version used in Ireland.
 

Contact: Mrs. Nora Keohane Hickey, Church Square, Kinsale, County Cork, Ireland.

Email: nmhickey@gmail.com

Website: http://keohanesofwestcork.weebly.com

 

 

 

 

 

 

Kilcrann of Leitrim – Mac Giolla Crann Liatroma

A small clan from South Leitrim and East Roscommon believed to be a branch of the Billrín Clan. Today only two groupings of the Kilcranns are found in Ireland, one at Corlaskagh near Mohill in Leitrim and the second just ten miles away at Cloonfad near Rooskey in Roscommon.

 

Email: kilcrann@yahoo.com

Website: www.kilcrann.webs.com

Contact: Rev. Fr. John Kilcrann CSSP, Provincialate, Temple Park, Richmond Ave South, Dublin 6

 

 

Mac Cabe of Breffny – Mac Cába Breffny

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)

Email: brianfrancis.mccabe@gmail.com

Contact: Mr. Brian McCabe, Ivy Cottage, Johnstown, Naas, County Kildare, Ireland.

 

 

 

MacCostello of Galway MacGoisdelbh Gaillimh

Contact:  Mr Sean Kennedy Costello,

Address: 201 Wellesworth Drive, Toronto, Ontario, Canada.

E-mail: cosclan@rogers.com

Mac Curtin of Thomond – Mac Curtáin Thuamhumhan

This clan orignates 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.
 
Website: www.curtin.org
Email:  curtinclan@gmail.com
Contact: Mr. Dan Curtin, 45 Bishop Nelson Road, Valatie, NY US 12184, phone 518-758-9480.
 
 

Mac Egan of Hy Many – Mac Aodhagáin Uí Maine

Mac Egan Clan Mac Aodhagáin (son of Egan) are an important family of brehons originally of Uí Maine later settled in Ormond.
 
Website: www.clanegan.org
Email: michael.egan@mjse.ie
Contact: Dr. Michael J.S. Egan CLJ, 10 Rathdown Crescent, Terenure, Dublin 6W, Ireland.
DNA Project in progress.
 
 
 
 

Mac Garvey of Ulster – Mac Gairbhith Ulaidh

The McGarvey Mac Gairbhith Septs Association currently represents the following Clans:

Ó Gairbhith of Donegal

Mac Gairbhith of Armagh

 

Contact: Mayor Jamie McGarvey, 42, River St., Parry Sound, Ontario, Canada. P2A 2T6.

Website: www.mcgarveyseptsofulster.com

Email: jamie.mcgarvey@sympatico.ca

Garvey, Ó Gairbhith

 

 

 

 

 

Mac Geoghegan of Westmeath – Mag Eochagáin na hIarmhí

(Mac) Geoghegan Clan Mag Eochagáin is one of the clans of the Southern Uí Néill.

 

Website: www.geoghegan.org/clan

Email: jasgeoghegan@gmail.com

Contact: Mr. James Geoghegan.

 

 

 

 

Mac Gillycuddy of the Reeks – Mac Giolla Chuda

MacGillycuddy (of the Reeks) Mac Giolla Chuda an important branch of the O'Sullivan Clan.

Chief: Donough McGillycuddy, Chief of the Name and Arms.

 

Website: www.mcgillycuddy.co.za

Email: mcgillycuddy01@gmail.com

Mac Ginley of Donegal – Mag Fhionnghaile Dhún na nGall

Mac Ginley Clan Mag Fhionnghaile is a Donegal Clan claiming descent from one who was "fair" or "valour".

 

Website: www.mcginleyclan.org

Email: eolas@mcginleyclan.org

Ginnell [Westmeath]; Ginnelly [Mayo].

Contact: Proinsias Mag Fhionnghaile, Teonraigh, Béal Átha Seanaidh, Tír Chonaill, Éire.

Mac Grath of Thomond – Mac Graith Tuadhmhuman

CONTACT: Mr. Dan McGrath, 47 Town Court, Dungarvan, Co. Waterford

EMAIL: danmcgrathmedia@gmail.com

WEBSITE: www.mcgrathclangathering.com

Mac Grath of Ulster – MacCraith na Uladh

The MacGrath Clan were co-arbs who settled at a place known as Termon MacGrath in south-west Ulster.

Contact: Mr. Seán Alexander McGrath KM,

Email: info@clanmcgrath.org
Website: www.clanmcgrath.org

Mac Kenna of Truath – Mac Cionaoith

Mac Kenna Clan Mac Cionaoith a branch of the Southern Uí Néill settled in County Monaghan where they were Lords of Truath.

 

Next International Clan Gathering: 22nd-24th April 2016, Four Seasons, Hotel Monaghan, Ireland.

Contact: Siobhan McKenna McQuillan, Clossagh Beg, Rockcorry, Co. Monaghan - Secretary
Email: clannmckenna@gmail.com OR siobhanmcquillan777@hotmail.com
Website: www.clannmckenna.ie

Mac Laughlin of Tirconnell – Mac Lochlainn Thír Chonaill

Mac Laughlin Clan Mac Lochlainn are a senior branch of the Northern Uí Néill and a leading sept of Tirconnell who's seat was originally at Inishowen .

Email: conormclaughlin@mailbox.org

Contact: Conor Brian McLaughlin, Fanaghan, Inver, Co. Donegal.

Mac Mullen – Mac Maoláin

Mac Mullen Mac Maoláin is a common surname in Ireland with more than one clan of the name.

 

Website: www.macmaolain.com

Email: laighinmc@gmail.com

Contact: Col. Lyn David McMullen, 21-125 Cabernet Drive Okanagan Falls, BC, Canada V0H1R3.

Mac Shane – Mac Seáin

Mac Shane Mac Seáin is equivalent to Johnson. In Ulster and Louth the Mac Shanes are a cadet branch of the O'Neills.

Website: www.clanmcshane.org
Contact name: Jameson  Johnson McShane
Address: Waldburg Strasse 45, 71032 Boblingen, Germany
Email: clanmcshane@yahoo.co.uk

 

 

Mannion of Soghan – Ó Mainnín Soghain

Website:   www.mannionclan.org
Email:   joe@mannionclan.org
Contact:  Dr. Joe Mannion, Bolag, Woodford, Co. Galway.
 

Marmion Clan – Mac Meanman

The Marmions are a gaelicised Norman-Irish family which entered Ireland in 1169-72. Centered from the origins in and around Carlingford, Co Louth, 'Patrick Marmion, Irish Papist' was stripped of his holdings in Carlingford in 1655, as were Marmions of Lecale barony in Co Down, who had also served as soldiers during the Rising which began in 1641.

After the Restoration Dundalk became  the primary center of the family. Branches did develop in Cork and Meath, along with Marmions in Flanders and Spain as 'Wild Geese' officers. And there was always some family in Dublin.

The Maid of Erin Statue in Dundalk Town Square (1898) is dedicated to Anthony Marmion and John Hoey, fellow rebels  who were hung for insurrection in 1798.  Blessed Dom Columba Marmion, OSB (1858-1923) born Dublin was of the Meath branch.  He was beatified in Rome in the year 2000.

Patron: O'Carroll of Oriel
Email:  marmioncenter@Hotmail.com
website:  http://marmioncenter.webs.com

Mulqueen of Ballymulqueeny – Ó Maolchaoin Baile-Ui-Maolchaoine

A clan located in the Co. Clare district of Thomand in north Munster.

Email: nemulqueen@gmail.com

Contact: Mr. Niall Mulqueen, 49 Silchester Park, Glenageary, Co.Dublin 

O Mahony Society – Muintir Mhathúna

O Mahony Ó Mathúna were Cenél nÁeda princes of the ancient Eóganacht Raithlind. They were also for a period kings of Munster and Desmond, and take their name from Mathgamain, son of Cian, son of Máel Muad mac Brain, King of Munster from around 960 to 970, and then again from 976 to 978. From 970 to 976 he was king of Desmond. His son Cian became a close ally of Brian Bóruma and married his daughter Sadb. From this marriage descend the O'Mahonys.

 

Website: www.omahonysociety.org

Email: dfomahoney@gmail.com

Contact: Ms Linda Baker, 1029 Daybreak Court, Leland NC 28541 USA

O'Brien of Thomond – Ó Briain

O'Brien Ó Briain are a Dalcassian clan who ruled the Kingdom of Thomond (Co. Clare and Co. Limerick) and later the Kingdom of Munster. The clan derive their name and historical important from the family of King Brian Boru. Today, the surname O'Brien is numerous across Ireland as well as in Munster.

 

Chief: Sir Conor Myles O'Brien, The O’Brien, Prince of Thomond, Chief of the Name, 18th Baron Inchiquin, 10th Baronet of Leamaneh.

Seat: Dromoland Castle.

Email:  chiefob@iol.ie 

 

 

O'Brosnan of Brosna – Ó Brosnacháin Brosnach

The O'Brosnan's are a small but significant clan originating in a place called Brosna in County Kerry. In fact, the name in Irish Ó Brosnacháin means "a son of the descendent from Brosna". Brosnan is one of a handful of locational surnames found in Ireland.

Contact: Mr. Paul Brosnan, Uisneach, New Road. Greystones, Co. Wicklow.

Email: brosnan01@gmail.com

Clan website: www.obrosnanclan.ie

O'Byrne of Leinster – Ó Broin Laighean

O'Byrne Ó Broin is a foremost clan in east Leinster, prominent in Irish history, especially in the resistance to English conquest.

 

Contact: Dr. Emmett O'Byrne, Hon Chief,  O'Byrne Solicitors, Office C25, Wicklow Enterprise Centre, The
Murrough, Wicklow Town, Co Wicklow.

Email: emmettobyrne@gmail.com

Website: www.clannobyrne.com

 

O'Carroll of Offaly – Ó Cearbhaill Uibh Fháilí 

Chief: Mr. David Alan O'Carroll

E-mail:  joeo@masterparts.com

Contact: Mr Joseph Robert O'Carroll, 33 Broadway Avenue, Newlands, Cape Town, 7700 South Africa.

O'Carroll of Oriel – Ó Cearbhaill Oirialla

O'Carroll Oriel Ó Cearbhaill Oirialla is an important clan who anciently ruled the Kingdom of Oriel (Co. Louth and Co. Monaghan).

Chief: Dr. Vincent J. O Carroll Oriel.

 

Website: www.carrolloforiel.com

E-mail: mscarroll@eircom.net

Contact: Dr Vincent J H O Carroll Oriel, Fairfield House, off Newbridge Avenue, Sandymount, Dublin 4.
 

O'Cleary of Co. Donegal – Clann Uí Chléirigh 

Email:    oclearyclan@gmail.com

Contact: Mr. Fergus Cleary, 5 Main Street, Belleek, Co. Fermanagh BT93 3FY

O'Crowley of Cork – Ó Cruadhlaoich Corcaigh

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.

 

Website1: www.crowleyclan.com

Email: james@obriencussen.com

Contact: Mr. James Crowley, Knocknagallagher, Bandon, Co. Cork.

DNA Project in progress

O'Dea of Dysert – Ó Deághaidh Dísert

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.

 

Website: www.odeaclan.org

e-mail: shanej.odea@gmail.com

Contact: Mr. Shane O’Dea 45, Carysfort Park, Blackrock, Co. Dublin.

O'Donnell of Tyrconnell – Ó Domhnaill Tír Chonaill

 

O'Donnell of Tyrconnell – Ó Domhnaill Tír Chonaill is the ruling clan of the ancient Kingdom of Tyrconnell who reigned until the completion of the English Conquest of Ireland in 1601. The clan's seat today remains focused mostly around County Donegal (with prominent branches in the Diaspora) but originally the Kingdom of Tyrconnell included all of Donegal and parts of Sligo, Leitrim, Fermanagh Tyrone and Southern Derry. The main seat of the clan's chiefly family is Donegal Castle.

 

Chief of the Name: Rev. Fr. Hugh O'Donnell, OFM, KM.

Tanaist: S.E. Don Hugo O'Donnell y Duque de Estrada,  KM, Duke of Tetuan.

 

Website:  https://clanodonnell.wordpress.com/clann-association/

Email: vodonnell@eircom.net

Contact:  Mr. Vincent O'Donnell, Inver, County Donegal, Ireland.

 

O'Donoghue Society – Cuman Ó Donnchadha

The O'Donoghue Society was established to represent the following distinct O'Donoghue Clans:

 

Eoghanacht Chaisil Ó Donnchadha of County Tipperary,

Eoghanacht Raithlinn Ó Donnchadha /Uí Eachach Mhumhan/Cinéal Laoghaire,

Uí Dhonnchadha of Breifne,

Uí Dhonnchadha of Ossory,

Uí Dhúnchadha of counties Wicklow and Dublin,

Uí Dhúnchadha of Fine Gall of County Meath,

Uí Dhonnchadha of Teallach Modhárain,

Ó Donnchadha of the Uí Cormaic of County Galway,

Ó Donnchadha of the Uí Fhiachrach of counties Mayo and Sligo,

Eoghanacht Ninussa Ó Donnchadha of County Clare,

Uí Dhonnchadha of the Déisi Mhumhan

 

Patron of the Society: Geoffrey Vincent O'Donoghue, The O'Donoghue of the Glens, Lord of Glenfesk.

 

Website: www.odonoghue.co.uk

Email: rod@odonoghue.co.uk

Contact: Mr. Rod O'Donoghue 30 Canonbury Park South, London N1 2FN, England

 

O'Dowd – Ó Dubhda Uí Fiachrach Muaidhe

The O'Dowd - Ó Dubhda clan traces its descent from Fiachra, brother of Niall of the Nine Hostages, through Daithi, the last pagan King of Ireland who, legend has it, was killed by a bolt of lightning as he led an army to the foot of the Alps in 455AD. For centuries they were the leading sept of the Uí Fiachrach Muaidhe  a tribal group that occupied part of the modern counties of Mayo and Sligo. The Uí Fiachrach provided successive kings of Connacht for a long period, but their sphere of influence became confined to North Connacht. In the late 10th century, their king was named Aedh Ua Dubhda (Hugh O'Dooda). He is recorded as having 'died an untroubled death' in the year 982, making this surname one of the oldest in Europe. His grandson, Maelruanaidh, who died in 1005 had the title of Lord of Hy Fiachrach.

Contact: Thomas Dowds

Address: 16 Halidon Avenue, Cumbernauld, Glasgow, Scotland, G67 4FB

Email: andrewdowds@yahoo.co.uk

Website: http://odubhda-odowdclan.com/

 

 

O'Driscoll of Corca Laoidhe – Ó hEidersceoil Corcu Loígde

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.

Website: www.odriscoll.ie

Email1: tom@bushesbar.com

Contact: Mrs Marion (O'Driscoll)Bushe, Bushes Bar, Baltimore, West Cork, Ireland

DNA Project in progress.
 

O'Dwyer Kilnamanagh – Ó Duibhir Coill na Manach

O'Dwyer/Dwyer of Kilnamanagh (in Irish O'Duibhir) are an ancient Irish clan who had the lordship of a region known as Kilnamanagh ("Wood of the monks") which straddled the modern Limerick/Tipperary border, and the highest density of the surname can still be found in that area. The territory was lost to the clan in the aftermath of the Cromwellian wars of the mid-seventeenth century, following the ill-fated capture of Cashel, the ancient Celtic seat of the Munster kings, by Philip O'Dwyer, the last clan chief. The clan was scattered to mainland Europe, forming part of that famous exodus known as the flight of the 'Wild Geese'.

Contact: Pádraig Uasal Ó Duibhir, Coismeagmór, Na Forbacha, An Spidéal.Co Na Gaillimhe
E-mail: oduibhir@eircom.net
Website: http://www.dwyerclan.com
 

O'Farrell of Annaly – Ó Fearghail Angaile

O'Farrell Ó Fearghail means "man of valour". This clan were numerous and important in Annaly and had their chief seat at Longfordm which was known as Longphort Uí Fhearghail (O'Farrell's fort). 

 

Website: www.farrellclanireland.com

Email: johncfarrell@eircom.net

Contact: Ballymacormack Longford Co Longford
 

O'Flanagan of Upperthird – Ó Flannagáin Uachtar Tíre

O'Flanagan Ó Flannagáin where Lords of Uachtar Tíre (Upperthird) which is located in County Waterford near Carrick-on-Suir. The O'Flanagans of Upperthird were dispossessed shortly after the English invasion by the family of Le Poer (now "Power"), who still possess a large portion of that territory

 

Website: www.oflannagain.org

E-mail: info@oflannagain.org

Contact: Mr. Antaine Ó Flannagáin, 21 Kirra Ave, Mitchell Park, SA,  Australia, 5043.
 

O'Flanagan – Ó Flannagáin

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 the above Clans are represented by the Flanagan Clans Society

Contact details:

Address: Granuaile O'Flanagan,55 Soi Ladphra 35, Baan Supar Apt, Room 405, Chan Kasem, Chatuchak, Bangkok, Thailand 10900
Email: granuaile1954@yahoo.com
Website: http://clanflanagan.org

 

See separate listing for Flanagan of Upperthird (Waterford).

O'Gara of Coolavin – Ó Gadhra Cúil Ó bhFinn

O'Gara Ó Gadhra means descendant of Gadhra' (an old Irish personal name, perhaps from gadhar, a dog, mastiff); the name of a Connacht family, of the same stock as the O'Haras of Leyney. Both families are descended from Lugh, son of Cormac Gaileng, and had from him the common clan-name of Luighne. When the two families separated, about the end of the tenth century, they divided this territory between them, the O'Haras taking the northern, or Sligo, portion, and the O'Garas the southern, in Co. Mayo. The O'Garas were then styled lords of Sliabh Lugha, but after the English invasion of Connacht they were driven out of this territory and forced to seek a new settlement. This they acquired in the district anciently known as Greagraidhe, and now as the barony of Coolavin, in Co. Sligo, from which in later times they were known as lords of Coolavin.

Website: www.ogara.org

Email: maura@webspider.ie

Contact: Mrs. Maura O'Gara-O'Riordan, 3 Cherry Park, Newcastle, Galway City, Ireland.

DNA Project in progress.

O'Higgins of Cenel Fiachach – Ó hUigin Cenél Fiachach

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.

Patron: Karl O'Higgins, The O'Higgins of Ballynary.

Website: www.ohigginsclan.com

Email: chief@ohigginsclan.com
 

DNA project in progress.

O'Hosey of Fermanagh – Ó hEodhusa Fhear Manach

O'Hosey, Husey Ó hEaodhusa were an important bardic family attached to the Maguires of Fermanagh.
 
Website: www.clanhosey.org
Email: hoseyclan@aol.com
Contact: Mr. Robert B. Hosey, 5757 Bermuda Drive, Walbridge Ohio 43465, U.S.A. DNA project in progress.

O'Kane of Keenaght – Ó Catháin Cianachta

O'Kane Ó Catháin were lords of Keenaght in Ulster up to the time of the Plantations.
 
Website: www.ocathainfestival.com
Email: johnokane@hotmail.co.uk
Contact: John A. O’Kane, 6 Adelaide Avenue, Kilfennan, Derry, BT47 5PD

O'Kearney of Derry – Ó Cearnaigh Doire

The O'Kearney clan were Erenaghs of Derry.

 

Contact: Dr. Chris Cairney

c/o Department of English, Middle Georgia State College,

1100 2nd St. SE, Cochran, GA 31014.

Telephone: + 478 934 3349.

Email: christopher.cairney@mga.edu

Website: www.cairneys.org

 

O'Kelly of Hy-Many – Síol Ceallaigh Ó Maine

The O'Kelly Clan of Hy-Many Síol Ceallaigh Ó Maine is a branch of the Oirghialla of Ulster and are alleged to have descended from Maine Mór (AD457), first prince and founder of the illustrious House of Hy-Many, through Ceallach (AD874), common ancestor of the extended O'Kelly family. As Chiefs of Hy-Many the O'Kelly's became one of the most powerful clans in Connacht with extensive territories in Galway, Clare and Roscommon, which were held down to the reign of Elizabeth I. Subsequently, much of the lands were held privately by O'Kellys until the end of the 17th. Century.

 

Chief of the Name: Count Robert O'Kelly, The O'Kelly de Gallagh et Tycooly.

Contact: Gearoid O Ceallaigh, 63 Linden Gardens, London W2 4HJ

Website:  www.okellyofhymany.com

 

 

 

 

O'Lafferty of Tyrone – Ó Laithbheartaigh Tír Eoghain

O'Lafferty Ó Laithbheartaigh are a clan of Ulster described in the Annals of the Four Masters as the "Tanists of Tyrone".

Website: www.clanlafferty.org

Email: jamie.richey@icloud.com

Contact: Jamie Lafferty Richey 544 Windy Road Mount Juliet, TN 37122

O'Lalor of Leix – Ó Leathlobhair Laoise

O'Lalor (Lawlor) Ó Leathlobhair are one of the "Seven Septs of Leix" who's seat was at the Rock of Dunamase.

 

Website: www.oleathlobhair.com

Email: oleathlobhair@gmail.com

Contact: Annie Lalor, Longford, Camross, Portlaoise, Co Laois, Ireland 

O'Malley Clan – Clann Ó Máille

Website: www.omalleyclan.ie

E-mail: omalleydenis@gmail.com

Contact: Mr. Denis O'Malley, Green Road, Murroe, County Limerick, Ireland

O'Mulvihill of Connacht – Ó Maoilmhichil Connachta

O'Mulvihill Ó Maoilmhichil 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.

 

Website: www.mulvihill.net

Email: jmulvihill@comcast.net

Contact: James M. Mulvihill

DNA Project in progress.

O'Neill – Ó Neill

(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

O'Neill of Munster i.e. Decies and Thomond.

 


Website: www.oneillclans.com

Email: sean@oneill.ie

Contact: The Association of O’Neill Clans,

c/o Seán O’Neill, Clifton, 48 Castle Ave., Clontarf, Dublin 3, Ireland.

 

 

 

O'Reilly Breifne – Bréifne Ó Raghallaigh

O'Reilly Clan ruled a region known as Bréifne O'Reilly which covered most of the  modern county of Cavan. At one stage the clan's territory extended into Meath and Westmeath, and were Chiefs of all of Bréifne at some points in history.

 

Contact: Chevalier Brendan O'Reilly KCHS.

Address: 34 Broadmeadow Green, Ashbourne, Co. Meath.

Email: brain@iol.ie

Website: www.oreillyclan.ie

 

 

 

 

O'Shaughnessy of Kiltartan – Ó Seachnasaigh Cill Tartan

O'Shaughnessy Ó Seachnasaigh are a branch of the Southern Uí Fiachrach said to be descended from Daithí who was the last pagan King of Ireland. The clan's seat is at Kiltartan in Galway.

Website: www.oshaughnessysociety.org

Email: dkos@btinternet.com

Contact: 6 Whitehall Road, Aghagallon, Lurgan, BT 67 OAE

O'Sullivan of Munster – Ua Súileabháin Mhumhain

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.

Website: www.osullivanclan.com

Email: taoiseach@osullivanclan.com

Contact: Daniel JSullivan (Chief), 5 Berg Avenue, Elberon, New Jersey 07740

O'Tierney – Ó Tighearnaigh

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)


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

Email: otighearnaigh@eircom.net

Contact: Mr. Cathaoir Ó Tighearnaigh, Naomh Antoine, 53 Árd Aoibhinn, Athenry, County Galway, Ireland.

DNA Project in progress.

Roche

The Roche Clan were a Norman family who settled in Ireland Munster and Wexford.

Contact: Sir David Roche Bt

Address: 20 Lancaster Mews, London, W2 3QE, England.

Email: sdr@rocheclan.org

Website: www.rocheclan.org

Shortt – Mac Girr/MacAnghearre

Website: https://www.facebook.com/groups/413094348713915/

E-Mail: galloglas@icloud.com

Contact: James Shortt, Castleshort, Castle Cosey, Castelbellingham, Co. Louth.

Weadick MacMurrough – Mac Mhadóc mac Murchadha

Weadick Mac Mhadóc are a cadet branch of the MacMurrough Clan of Leinster. The Weadicks held their seat in south west Leinster and are numerous throughout Counties Wexford and Wicklow.

Vaddock, Waddock, Wadock, Waddick, Wadick, Waydock, Weadock, Weddick, Wedick.

Contact: Mr. Joe Weadick, 44 Fernhill, Arklow County Wicklow, Ireland.

Email: joeweadick@eircom.net