Sarah Churchill, Duchess of Marlborough
John Churchill, Marquess of Blandford (13 February 1686 20 February 1703) (sometimes called Charles Churchill) was a British nobleman. He was the heir apparent to the Dukedom of Marlborough as the only surviving son of John Churchill, 1st Duke of Marlborough, an accomplished general, and Sarah Churchill, Duchess of Marlborough, a close friend of Queen Anne. Blandford died childless in 1703, and upon his father's death in 1722, the dukedom passed to his eldest sister, Lady Henrietta Godolphin (née Churchill).