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Ferdinand II (Fernando de Aragón in Spanish and Ferran d'Aragó in Catalan), nicknamed the Catholic (March 10, 1452 – June 23, 1516) was king of Aragon, Castile, Sicily, Naples, Valencia, Sardinia and Navarre and Count of Barcelona.
Ferdinand, the son of John II of Aragon by his second wife, the Aragonese noblewoman Juana Enriquez, was made King of Sicily by his father in 1468 in preparation for his marriage to Infanta Isabella, the half-sister and heiress of Henry IV of Castile.
Ferdinand allied with various Italian princes and with Emperor Maximilian I, to expel the French by 1496 and install Alfonso's son, Ferdinand, on the Neapolitan throne.
Ferdinand V, called The Catholic (1452-1516), king of Castile (1474-1504); as Ferdinand II he was also king of Sicily (1468-1516) and of Aragón (1479-1516); as Ferdinand III, king of Naples (1504-1516).
The union of the Spanish kingdoms of Aragón and Castile was effected in 1469 by Ferdinand's marriage to his cousin Isabella I, queen of Castile.
Ferdinand had hoped by this alliance to obtain the Castilian crown for himself, but his high-spirited and politically astute wife firmly retained sovereign authority in her own realm.