Donough O'Brien (died 1582)

Donough O'Brien
Portrait of Donough, painted in 1577 on panel
Bornc. 1525
Kingdom of Thomond, Ireland
Died29 September 1582
Gates of Limerick
Spouse(s)Slaney McNamara
IssueConor O'Brien
Margaret O'Brien
Fenoli O'Brien
FatherMurrough O'Brien, 1st Earl of Thomond
MotherEleanor FitzGerald
Slaney O'Brien (née McNamara), wife of Donough

Donough O'Brien (Irish: Donnchadh Ó Briain) (died 29 September 1582) was the third son of Murrough O'Brien and the ancestor of the Leameneagh branch of that family.