public profile
Son of Donnchadh ramhar O'Brien, 2nd Earl of Thomond and Helen O'Brien (Butler), Countess of Thomond Husband of N.N. O'Mulrian Father of Murchad Ó Briain and Conchobhar Ó Briain Brother of Conchobar O'Brien, 3rd Earl of Thomond; Penelope FitzMaurice and Lady Margaret O'Brien, Baroness of Inquin