What is the name of the man who had an affair with Sancha of Aragon?
Sancha of Aragon:  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. Giovanni Borgia, 2nd Duke of Gandia: Giovanni Borgia, 2nd Duke of Gandía (1474 or 1476–1497) was the son of Pope Alexander VI a member of the House of Borgia who was murdered in 1497.
Giovanni Borgia