Afonso I, Duke of Braganza Afonso I, Duke of Braganza Dom Afonso I of Braganza (; 10 August 1377 – 15 December 1461) was the first Duke of Braganza and the eighth Count of Barcelos. He would start a dynasty, the House of Braganza, that would end up being the most powerful and wealthy in all of Portugal. His descendants would go on to become high-ranking nobles, imperial officials, and even the Kings of Portugal and the Emperors of Brazil. Historians believe he was born in Veiros, Estremoz, Alentejo, as a natural son of Portuguese King John I and Inês Peres. He married the heiress
Duarte Nuno, Duke of Braganza the (Austrian) Order of the Golden Fleece. Duarte Nuno is buried in the Augustinian monastery in Vila Viçosa, the traditional burial place of the Dukes of Braganza. As the head of the House of Braganza, Duarte Nuno held the following positions: Duarte Nuno, Duke of Braganza "Dom" Duarte Nuno, Duke of Braganza (23 September 1907 – 24 December 1976) was the claimant to the defunct Portuguese throne, as both the Miguelist successor of his father, Miguel, Duke of Braganza, and later as the head of the only Brigantine house, after the death of the last Legitimist Braganza, King Manuel II