Joanna, Princess of Portugal (d. 1490)
Joan of Portugal (6 February 1452 – 12 May 1490; Portuguese: Santa Joana Princesa, Portuguese pronunciation: [ˈsɐ̃tɐ ʒuˈɐnɐ pɾĩˈsezɐ]) was a Portuguese regent princess of the House of Aviz, daughter of King Afonso V of Portugal and his first wife Isabella of Coimbra. She served as regent during the absence of her father in 1471. She is venerated in the Catholic Church.