Robert Spencer, 2nd Earl of Sunderland, KG PC (1641-1702) was the son of Henry Spencer, 1st Earl of Sunderland and Dorothy Sydney. He m. 10 Jun 1665 Lady Anne Digby (d. 26 Apr 1715; bur. at Great Brington, co. Northampton), only surv. sister and hrss. of John [Digby], 3rd Earl of Bristol, and 2nd dau. of George [Digby], 2nd Earl of Bristol, by his wife Lady Anne Russell, 2nd dau. of Francis [Russell], 4th Earl of Bedford.
Hon Robert Spencer, styled Lord Spencer, Guidon 1685 and Cornet 1688 in the 3rd Troop of Horse Guards, Envoy to the Duke of Modena on a special mission 1687 (bapt. 2 May 1666; dvp. 5 Sep 1688 in Paris)
Hon Charles Spencer, later 3rd Earl of Sunderland
Lady Anne Spencer (dsps. 2 Jul 1690), mar. bef. 5 Jan 1687 as his first wife John [Hamilton], 4th Duke of Hamilton, and had issue
Lady Elizabeth Spencer (b. c. 1673; d. Jun 1704), mar. 31 Dec 1684 Donough McCarthy, 4th Earl of Clancarty, and had issue
Page 51: "Robert Spencer, K.G. fourth Lord Spencer of Wormleighton, and second Earl of Sunderland; he married Anne, daughter of George Digby, Earl of Bristol, and died in 1702. He was the grandfather of Charles, fifth Earl of Sunderland, who on the demise of his aunt, Henrietta, Countess Godolphin and Duchess of Marlborough, succeeded to the honours of his illustrious, grandfather, John Churchill, Duke of Marlborough."