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?
Richard III of England Richard III (2 October 1452 – 22 August 1485) was King of England from 1483 until his death in 1485, at the age of 32, in the Battle of Bosworth Field. He was the last king of the House of York and the last of the Plantagenet dynasty. His defeat at Bosworth Field, the last decisive battle of the Wars of the Roses, marked the end of the Middle Ages in England. He is the subject of the historical play "Richard III" by William Shakespeare.
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.