Margaret O'Brien Peerage person ID=216911 (b. 1530) Parents Eleanor fitz John Murrough O'Brien, 1st Earl of Thomond Children Ulick Burke, 3rd Earl of Clanricarde Mary de Burgh Siblings Slany O'Brien Ranelt O'Brien Donogh McMurrough O'Brien Aine O'Brien Dermod O'Brien, 2nd Baron Inchiquin unknown daughter O'Brien Honora O'Brien Teige Mac Murrough O'Brien Torlogh O'Brien Partners unknown MacNamara Ross O'Loughlen Richard Burke, 2nd Earl of Clanricarde