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.
Judith of Flanders Judith of Flanders (or Judith of France) ( 843 – c. 870) was queen consort of Wessex and countess consort of Flanders. She was the eldest daughter of the West Frankish King and later Holy Roman Emperor Charles the Bald and his wife Ermentrude of Orléans. Through her marriages to two Kings of Wessex, Æthelwulf and Æthelbald, she was twice a queen. Her first two marriages were childless, but through her third marriage to Baldwin, she became the first Countess of Flanders and an ancestor of later Counts of Flanders. One of her sons by Baldwin married Ælfthryth, a daughter of Æthelbald's brother, Alfred the Great. She was also an ancestor of Matilda of Flanders, the consort of William the Conqueror, and thus of later monarchs of England.