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Donough O'Brien, 2nd Earl of Thomond

Donough O'Brien
2nd Earl of Thomond & Baron Ibrackan
Spouse(s) Helen Butler
Issue
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", 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.

Children of Donough O'Brien and Helen Butler:

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


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