Sir Robert Spencer (d.pre-1510) "of Spencer Combe" in the parish of Crediton, Devon, was the husband of Eleanor Beaufort (1431–1501), the daughter of Edmund Beaufort, 2nd Duke of Somerset (1406–1455), KG, and was father to two daughters and co-heiresses who made notable marriages.
The origins of Spencer are unclear. The Devon historian Tristram Risdon (d.1640), quoting his source "Vincent upon Brooke and Mills", suggested he was lord of the manor of Spencer Combe in the parish of Crediton, Devon, which his ancestor Richard Spencer had inherited by marriage to Alice Hody, daughter of William Hody of Combe Lancells, whose own family had inherited it from the Lancells family. However Risdon's contemporary Sir William Pole (d.1635) makes no mention of Sir Robert at Spencer Combe, and states that the estate descended via the heiress Jone Spencer to the Giffard family. His origin at Spencer Combe is however traditional, and is given thus in most published pedigrees and rolls of arms.
The American genealogist Douglas Richardson suggests that Sir Robert Spencer was in fact the son and heir of John Spencer, Esquire, MP for Dorset, of Frampton in Dorset, Ashbury in Devon and Brompton Ralph in Somerset, by his wife Jone.
Little if anything is known about the career of Sir Robert Spencer, other than Risdon's statement that he was "Captain of the castle of Homet and Thomeline in Normandy". Due to his wife's inheritance of the manor and advowson of Hazelbury Bryan in Dorset, Spencer made presentations to the rectory in 1493 and 1496.
He held the following manors, in right of his wife's dower:
In about 1465 he married (as her 2nd husband) Eleanor Beaufort (1431–1501), the daughter of Edmund Beaufort, 2nd Duke of Somerset (1406–1455), KG, and a sister of the 3rd and 4th Dukes of Somerset, widow of James Butler, 5th Earl of Ormond, 1st Earl of Wiltshire (d.1461). He had by his wife progeny of two daughters and co-heiresses as follows: