Mary Villiers (died 1753) (1670–1753) Parents Lady Frances Howard Edward Villiers Children William O'Brien, 4th Earl of Inchiquin Lady Henrietta O'Brien James O'Brien Lady Mary O'Brien Charles O'Brien Siblings Edward Villiers, 1st Earl of Jersey Anne Villiers Henry Villiers Henrietta Villiers Katherine Villiers Elizabeth Hamilton, Countess of Orkney Barbara Villiers Partners William O'Brien, 3rd Earl of Inchiquin