Career
Philippa was the daughter of Jacob Wendell III (ca 1869–1911) and Marian Fendall (1870). Marian was in turn the granddaughter of Philip Richard Fendall II (1794–1867), the District Attorney of the District of Columbia. Philippa was the sister of Anne Catherine Tredick Wendell, wife of Henry Herbert, 6th Earl of Carnarvon.
Randolph and Philippa had the following children:
Lady Antonia Marian Amy Isabel Stewart (born 3 December 1925)
Randolph Keith Reginald Stewart, 13th Earl of Galloway (born 14 October 1928).
