Duchy of Vilafermosa

The Duchy of Vilafermosa is a line of dukes in Aragón, originated in 1476 by King John II of Aragón whose members bear the family name of Aragó. The first duke was a bastard of John II called Alfons d'Aragó (Alphonse of Aragó).

Dukes:
 * Alphonse I  until 1485
 * Alphonse II 1485-1513
 * John I      1513-1528
 * Alphons III 1528-1550
 * Martí       1550-1581
 * Aldonça, sister of Martí; she originated the family of Azlor, titled Dukes of Vilafermosa
 * Ferran I    1581-1592
 * María Luisa (duchess), daughter of Ferran I; she originated the families named Borja and Aragó-Gurrea, titled Dukes of Vilafermosa, by union to the descents of the last duchess
 * Francesc I  1592-1622
 * Joana-Lluisa 1622–1652, daughter of Francesc I, she originated the families Borja and Aragó-Gurrea.