Isabel de Aragón y de Cardona 1545 - 31 Aug 1578 (1545–1578) Parents Antonio d'Aragona, 2.Duca di Montalto, Grandee of Spain Children Juan de la Cerda, 6th Duke of Medinaceli Siblings Antonio d'Aragona Cardona Partners Juan de la Cerda, 5th Duke of Medinaceli