Eleanor of Naples, Duchess of Ferrara (d. 1493)
Eleanor of Naples (Leonora or Eleonora of Aragon; 22 June 1450 – 11 October 1493) was duchess of Ferrara by marriage to Ercole I d'Este. She was the first duchess of Ferrara, and mother of many famous Renaissance figures. She was a well known political figure, and served as regent of Ferrara during the absence of her spouse.