Catherine Sedley, Countess of Dorchester British countess (1657-1717) (1657–1717) Parents Lady Catharine Savage Sir Charles Sedley, 5th Baronet Children David Colyear, Viscount Milsington Charles Colyear, 2nd Earl of Portmore Catherine Sheffield, Duchess of Buckingham and Normanby James Darnley Siblings Sir Charles Sedley Partners James II of England David Colyear, 1st Earl of Portmore
