His maternal great-grandfather was Henry Percy, 4th Earl of Northumberland, whose wife was Maud Herbert, Countess of Northumberland. His maternal grandmother was a daughter of Sir Robert Spencer and Eleanor Beaufort. Eleanor was a daughter of Edmund Beaufort, 2nd Duke of Somerset and Eleanor Beauchamp. She was a granddaughter of Richard de Beauchamp, 13th Earl of Warwick and Elizabeth Berkeley.
Eleanor
Eleanor Beauchamp