Donough O'Brien, 2nd Earl of Thomond

Donough O'Brien
2nd Earl of Thomond & Baron Ibrackan
Spouse(s)	Helen Butler
Issue Margaret O'Brien Connor O'Brien, 3rd Earl of Thomond Donal O'Brien Honora O'Brien
Noble family	Ua Briain
Father	Connor O'Brien, King of Thomond
Mother	Annabell Burke
Died	1 April 1553

Donough O'Brien, 2nd Earl of Thomond (died 1 April 1553), also known as "the fat",^[1] was the son of Connor O'Brien, King of Thomond and Annabell Burke.

O'Brien married Helen Butler, daughter of Piers Butler, 8th Earl of Ormonde and Lady Margaret Fitzgerald. He died on 1 April 1553, after being attacked by his brothers at the family seat of Clonroad. O'Brien's brother Donald was named king of Thomond by the Dalgais, but O'Brien's son, Connor, allied himself with the English and regained control of his lands.^[2]

Children of Donough O'Brien and Helen Butler:

Margaret O'Brien (d. 1568) married Dermod O'Brien, 2nd Baron Inchiquin
Connor O'Brien, 3rd Earl of Thomond (c. 1535–1581)
Donal or Daniel
Honora married Teige Macnamara

O'Brien also fathered an illegitimate daughter, Mary, who married Theobald Burke, son of William Burke, 1st Baron Bourke of Castleconnell.

References

↑ Cokayne, George Edward, ed. (1896). Complete peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, extant, extinct or dormant (S to T). 7 (1st ed.). London: George Bell & Sons. p. 391. Retrieved 28 December 2011.
↑ O'Donoghue, John (1860). Historical memoir of the O'Briens: with notes, appendix, and a genealogical table of their several branches. Hodges, Smith, & Co. pp. 187–188. Retrieved 28 December 2011.

Peerage of Ireland
New creation	Baron Ibrackan 1543–1553	Succeeded by Connor O'Brien
Preceded by Murrough O'Brien	Earl of Thomond 1551–1553

Ó Briain

General	High Kings of Ireland Kings of Munster Kings of Thomond Kings of Dublin Kings of Mann and the Isles Earl of Thomond Viscount Clare Baron Inchiquin O'Brien baronets Clare's Dragoons Composition of Thomond

Ó Briain	Brian Bóruma Donnchad mac Briain Tadc mac Briain Murchad mac Donnchada Toirdhealbhach Ua Briain Muircheartach Ua Briain Domnall mac Taidc Domnall Gerrlámhach Diarmait Ua Briain Conchobar Ua Briain Bé Binn Ní Briain Brian Ua Briain Toirdelbhach mac Diarmaida Ó Briain Muircheartach mac Toirdelbhach Ó Briain Domhnall Mór Ó Briain Muircheartach Finn Ó Briain Conchobhar Ruadh Ó Briain Donnchadh Cairprech Ó Briain Conchobhar na Suidaine Ó Briain

Ó Briain Clann Brian Ruadh	Brian Ruadh Ó Briain Donnchadh mac Brian Ruadh Ó Briain Diarmuid Cléirech Ó Briain Donnchadh mac Domhnall Ó Briain Brian Bán Ó Briain

Ó Briain Clann Tadhg	Tadhg Cael Uisce Ó Briain Toirdelbach Ó Briain Donnchadh mac Toirdelbach Ó Briain Muircheartach Ó Briain Diarmuid mac Toirdelbach Ó Briain Mathghamhain Maonmhaighe Ó Briain Brian Sreamhach Ó Briain Toirdelbhach Maol Ó Briain Conchobhar mac Mathghamhna Ó Briain Tadhg an Glemore Ó Briain Mathghamhain Dall Ó Briain Toirdelbhach Bóg Ó Briain Tadhg an Chomhaid Ó Briain Donnchadh mac Mathghamhna Ó Briain Conchobhar na Srona Ó Briain Toirdelbhach Óg Ó Briain Toirdelbhach Donn Ó Briain Conchobhar mac Toirdhealbaig Ó Briain Murchadh Carrach Ó Briain

Ó Briain Tuamhain	Donough I O'Brien Connor O'Brien Donough II O'Brien Henry I O'Brien Barnabas O'Brien Henry II O'Brien Henry Ibrackan O'Brien Henry Horatio O'Brien Henry III O'Brien

Ó Briain Chláir	Daniel I O'Brien Connor O'Brien Daniel II O'Brien Daniel III O'Brien Charles I O'Brien Charles II O'Brien Charles III O'Brien

Ó Briain Inse Uí Chuinn	Dermod I O'Brien Murrough I McDermot O'Brien Murrough II O'Brien Dermod II O'Brien Murrough III O'Brien William I O'Brien William II O'Brien William III O'Brien James O'Brien Edward Dominic O'Brien Murrough IV O'Brien William IV O'Brien James O'Brien

Ó Briain Drom Ólainn	Donough O'Brien Edward I O'Brien Lucius I O'Brien Edward II O'Brien William Smith O'Brien Lucius II O'Brien Edward Donough O'Brien Lucius William O'Brien Donough Edward Foster O'Brien Pádraig Lucius Ambrose O'Brien Conor Myles John O'Brien

Places	County Clare County Limerick Dromoland Castle

Kinsmen	MacMahon MacConsidine MacLysaght O'Crotty

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Donough O'Brien, 2nd Earl of Thomond

References

Further reading