Ferdinand II was the king of Aragon and king of Castile (as Ferdinand V) from 1479, joint sovereign with Queen Isabella I. As Spanish ruler of southern Italy, he was also known as Ferdinand III of Naples and Ferdinand II of Sicily. He united the Spanish kingdoms into the nation of Spain.
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The Editors of Encyclopaedia Britannica. "Who was King Ferdinand II?". Encyclopedia Britannica, 17 Mar. 2025, https://www.britannica.com/question/Who-was-King-Ferdinand-II. Accessed 30 March 2025.