Robert Ker, 3rd Earl of Roxburghe (died 1682) (1658–1682) Parents Jean Ker William Ker, 2nd Earl of Roxburghe Children John Ker, 1st Duke of Roxburghe William Kerr Robert Ker, 4th Earl of Roxburghe Siblings John Bellenden, 2nd Lord Bellenden Lady Jean Ker Partners Lady Margaret Hay