Donnell O'Brien Peerage person ID=160850 (d. 1579) Parents Anabel de Burgh Connor O'Brien Children Teig O'Brien Honora O'Brien Margaret O'Brien Sawney O'Brien Murtough O'Brien Sir Terlough O'Brien Móre O'Brien Connor O'Brien Aine O'Brien Penelope O'Brien Donogh O'Brien Siblings Slany O'Brien Donough O'Brien, 2nd Earl of Thomond Móre O'Brien Margaret O'Brien Murrough O'Brien Sir Turlough O'Brien Murtough O'Brien Teig O'Brien Partners Slany O'Brien unknown MacNamara