Lady Catherine Erskine (died 1635) (1603–1635) Parents Marie Stewart, Countess of Mar John Erskine, 18th Earl of Mar Children Thomas Hamilton, 3rd Earl of Haddington John Hamilton, 4th Earl of Haddington Siblings Lady Margaret Erskine Lady Mary Erskine James Erskine, 6th Earl of Buchan Henry Erskine, Master of Cardross Lady Anne Erskine Sir Charles Erskine of Alva Sir John Erskine of Otterstoun John Erskine