Margaret O'Brien Peerage person ID=483181 (b. 1505) Parents Anabel de Burgh Connor O'Brien Children William Odhar O'Carroll Siblings Donnell O'Brien Slany O'Brien Donough O'Brien, 2nd Earl of Thomond Móre O'Brien Murrough O'Brien Sir Turlough O'Brien Murtough O'Brien Teig O'Brien Partners unknown Bourke Owney O'Loughlin Fearganainm O'Carroll