Margareth Boyle Peerage person ID=38379 (1644–1683) Parents Roger Boyle, 1st Earl of Orrery Lady Margaret Howard Children Henry O'Brien Lady Margaret O'Brien unknown son O'Brien William O'Brien, 3rd Earl of Inchiquin Siblings Henry Boyle Lady Elizabeth Boyle Roger Boyle, 2nd Earl of Orrery unknown daughter Boyle Lady Barbara Boyle unknown daughter Boyle unknown daughter Boyle Partners William O'Brien, 2nd Earl of Inchiquin