Duarte, Duke of Guimarães was a Portuguese infante; the sixth son of King Manuel I of Portugal and his wife Maria of Aragon. Wikipedia
Born: October 7, 1515, Kingdom of Portugal
Died: September 20, 1540 (age 24 years), Lisbon, Portugal
Great-grandparents: Edward I of Portugal, John, Constable of Portugal, Isabella of Portugal, Queen of Castile, and more
Grandchildren: Teodósio II, Duke of Braganza, Ranuccio I Farnese, Margherita Farnese, and more
Parents: Manuel I of Portugal and Maria of Aragon, Queen of Portugal