Ferdinand I, king of Aragon (born 1379)

Ferdinand I named Ferdinand of Antequera and also the Just was king of Aragon, Valencia, Majorca, Sardinia and (nominal) Corsica and king of Sicily, duke (nominal) of Athens and Neopatria, and count of Barcelona, Roussillon and Cerdanya (1412–1416). He was also regent of Castile (1406–1416). He was the first Castillian ruler of the Crown of Aragon.