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.
Sir Edward de Courtenay Sir Edward Courtenay (c.1385 – c. August 1418) was the eldest son of Edward de Courtenay, 11th Earl of Devon (d. 5 December 1419). He fought at Agincourt, and was killed in a sea battle in Henry V's continuing campaigns in Normandy.