Leonor of Aragon was a Spanish noblewoman born in 1450, known for her marriage to Ferdinand II of Aragon. She was the daughter of John II of Aragon and Juana Enríquez, and her union with Ferdinand helped strengthen the political ties between the kingdoms of Aragon and Castile. As Queen consort of Castile, Leonor played a significant role in the politics of her time. She was the mother of several children, including Isabella I of Castile, who would later unite Spain through her marriage to Ferdinand. Leonor's influence extended beyond her lifetime, shaping the future of the Spanish monarchy.