フアン・マヌエル
She was the daughter of Juan Manuel, Prince of Villena (1282–1348) and his second wife Blanca Núñez de Lara de La Cerda. Her mother Blanca (d. 1347) was a descendant of the lords of Biscay and of Lara and of Alfonso X's eldest son, Fernando de la Cerda. She was the last legitimate member of the House of Ivrea.