Alfonso I, Duke of Gandia
Alfonso de Aragón y Foix also called Alfonso I of Gandía "the old" and Alfonso IV of Ribagorza, was the eldest son of Count Pedro de Aragón y Anjou and Juana of Foix. He was the grandson of James II of Aragon and cousin of Pedro IV "the Ceremonious". He held the titles of Duke of Gandia, Count of Denia, Count of Ribagorza, Marquis of Villena, and first Constable of Castile.
He was a claimant to the Crown of Aragon in the succession crisis that followed the death of Martin of Aragon with no children. Alfonso claimed the crown as senior male-line descendant of James II. Alfonso died before the crisis was resolved by the Compromise of Caspe; his claim was inherited by his brother, Juan of Aragon and Foix.
