Harry Powlett, 4th Duke of Cleveland British diplomat and politician (1803-1891) (1803–1891) Parents Lady Catherine Margaret Powlett William Vane, 1st Duke of Cleveland Children Siblings William Vane, 3rd Duke of Cleveland Henry Vane, 2nd Duke of Cleveland Lady Arabella Vane Lady Caroline Vane Lady Louisa Vane Lady Laura Vane Lady Augusta Vane Partners Wilhelmina Powlett, Duchess of Cleveland