Ferdinand II of Aragon
Fernando II de Aragn , called the Catholic, was King of Sicily from 1468 and King of Aragn from 1479 until his death. As a consequence of his marriage to Isabella I, he was King of Castile jure uxoris as Ferdinand V from 1474 until her death in 1504. He was recognised as regent of Castile for his daughter and heir, Joanna, from 1508 until his own death. In 1504, after a war with France, he became King of Naples as Ferdinand III, reuniting Naples with Sicily permanently and for the first time since 1458. In 1512, he became King of Navarre by conquest.
Ferdinand was born in Sada Palace, Sos del Rey Catlico, Kingdom of Aragon, as the son of John II of Aragon by his second wife, Juana Enrquez. He married Infanta Isabella, the halfsister and heiress of Henry IV of Castile, onOctober 1469 in Valladolid, Kingdom of Castile and Leon. Isabella also belonged to the royal House of Trastmara, and the two were cousins by descent from John I of Castile. They were married with a clear prenuptial agreement on sharing power, and under the joint motto tanto monta, monta tanto. He became jure uxoris King of Castile when Isabella succeeded her deceased brother in 1474 to be crowned as Queen Isabella I of Castile. The two young monarchs were initially obliged to fight a civil war against Joan of Castile , the purported daughter of Henry IV, and were swiftly successful. When Ferdinand succeeded his father as King of Aragon in 1479, the Crown of Castile and the various territories of the Crown of Aragon were united in a personal union. For the first
Source: Wikipedia