Who is XXX's sister?
Marie d'Alençon
Pierre d'Alençon (1374 -- 1375) Jean d'Alençon (1375 -- 1376) Marie d'Alençon (1377 -- 1377) Jeanne d'Alençon (1378 -- 6 August 1403 Catherine of Alençon (1380 Verneuil-sur-Avre -- 25 June 1462. She married firstly in 1411, Peter d' Évreux, Infante of Navarre, Count of Mortain, and secondly on 1 October 1413, Louis VII, Duke of Bavaria--Ingolstadt. By her last marriage she had a son Johann (Born 6 February 1415) and an unnamed daughter. Both children died young. Marguerite d'Alençon (1383- after 1400). Nun at Argentan. Jean, Duke of Alençon (9 May 1385- 25 October 1415 at The Battle of Agincourt). On 26 June 1396, he married Marie of Brittany (18 February 1391- 18 December 1446). They had five children, including his heir, Jean II, Duke of Alençon.
Catherine of Alençon