John Johnstone (1665-1714) (1665–1714) Parents James Johnstone, 1st Earl of Annandale and Hartfell Lady Henrietta Douglas Children unknown daughter Johnstone Siblings William Johnstone, 1st Marquess of Annandale Margaret Johnstone Henrietta Johnstone George Johnstone James Johnstone, Lord Johnstone Lady Mary Johnstone Partners Catharina Christina von Ahlefeldt