Robert Ker, 2nd Duke of Roxburghe Scottish peer (1709–1755) Parents Lady Mary Finch John Ker, 1st Duke of Roxburghe Children Lady Mary Ker John Ker, 3rd Duke of Roxburghe Lord Robert Ker Lady Essex Ker Siblings Lady Mary Saville Dorothy Boyle, Countess of Burlington and Countess of Cork Partners Essex Mostyn
