Anne de Mortimer, Countess of Cambridge was the grandmother of the last of the Plantagenet dynasty whose defeat at Bosworth Field marked the end of what in England?
Anne de Mortimer Anne de Mortimer, Countess of Cambridge (27 December 1390 – c. 22 September 1411), was the mother of Richard Plantagenet, 3rd Duke of York, and the grandmother of King Edward IV and King Richard III.
Humphrey, Duke of Gloucester Humphrey of Lancaster, 1st Duke of Gloucester, 1st Earl of Pembroke, KG (3 October 1390 – 23 February 1447) was an English nobleman. He was "son, brother and uncle of kings," being the fourth and youngest son of Henry IV and his first wife Mary de Bohun, the brother of Henry V, and the uncle of Henry VI.