Sancha of Aragon
Sancha of Aragon, or Sancia of Aragon, was an illegitimate daughter of King Alfonso II of Naples and his mistress Trogia Gazzela. In 1494, she was married to Gioffre Borgia, youngest son of Pope Alexander VI. Upon her marriage, she and her husband were created Prince and Princess of Squillace, a province in the south of Italy. For the majority of their marriage, Sancha and her husband lived in the Vatican with the rest of his family. There Sancha became friends with her sister-in-law Lucrezia, and allegedly had affairs with both of her husband's older brothers: Juan Borgia, 2nd Duke of Gandia, also known as Giovanni Borgia, and Cesare Borgia. Her affair with Juan is sometimes said to be the reason for Cesare's alleged murder of Juan in 1497.