Duchy of Braganza Duchy of Braganza The Duchy of Braganza (Portuguese: Ducado de Bragança) has been the fief of an important Portuguese noble family: the House of Braganza, and is one of the most important Dukedoms of Portugal. Created in 1442 by King Afonso V of Portugal for his uncle Afonso, Count of Barcelos (natural son of John I of Portugal), it is one of the oldest fiefdoms in Portugal. After the accession of the House of Braganza to the Portuguese throne in 1640, following the House of Habsburg, the heir to the throne of Portugal was styled as the Duke of Braganza
Teodósio I, Duke of Braganza of Braganza. In 1559, he remarried with Beatriz of Lencastre (1542–1623), granddaughter of Infante George of Lencastre, Duke of Coimbra. Their first child, Jaime of Braganza, died without issue in 1578, in the Battle of Alcacer Quibir. Their second child, Isabel, married the 1st Duke of Caminha. Teodósio I, Duke of Braganza Dom Teodósio I of Braganza (; 1510 – 22 September 1563) was the 5th Duke of Braganza, among other titles. He is known for ceding the title of Duke of Guimarães to Infante Duarte of Aviz, alongside some of the wealth and properties of the House of Braganza.