Background
His mother was Lady Anne Churchill, the daughter of John Churchill, 1st Duke of Marlborough and Sarah Churchill, Duchess of Marlborough.
Duke of Marlborough Whig politician
His mother was Lady Anne Churchill, the daughter of John Churchill, 1st Duke of Marlborough and Sarah Churchill, Duchess of Marlborough.
Known as Lord Spencer between 1702 and 1722, he succeeded to the Earldom after his father"s death in, but died in 1729 with no children. Robert Spencer was the potential heir to the dukedom of Marlborough. 24 October 1701 – 28 September 1702: The Honourable Robert Spencer
28 September 1702 – 19 April 1722: Lord Spencer
19 April 1722 – 15 September 1729: The Right Honourable The Earl of Sunderland.