Question: What is the date of death of John Ii, Duke Of Alençon's mother?
Sentence (from "John II, Duke of Alençon"): John II of Alençon (2 March 1409, Château d'Argentan – 8 September 1476, Paris) was the son of John I of Alençon and his wife Marie of Brittany, Lady of La Guerche (1391–1446), daughter of John V, Duke of Brittany and Joan of Navarre.
Relevant evidence: Yes