Margaret O'Brien Peerage person ID=483173 Parents Donnell O'Brien Slany O'Brien Children Siblings Móre O'Brien Sawney O'Brien Murtough O'Brien Sir Terlough O'Brien Donogh O'Brien Connor O'Brien Honora O'Brien Penelope O'Brien Teig O'Brien Aine O'Brien Thomas FitzMaurice, 12th Baron of Kerry and Lixnaw Edmond FitzMaurice, 11th Baron of Kerry and Lixnaw