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
House of Braganza children by his first wife, Leonor of Pérez de Guzman, and the later eight children by his second wife, Joana of Mendoça, all saw successful lives under the restored House of Braganza. Jaime I's first daughter, Isabel of Braganza, married Infante Duarte, Duke of Guimarães, and had three children, while his first son and successor, Teodósio I, was a successful prince of the Portuguese Renaissance. Five of Jaime I's children, Jaime, Maria, Fulgêncio, Teotónio, and Vicência, all entered into religious orders. The Duke's second daughter, Joana of Braganza, married Bernardino de Cardenas, 3rd Marquis of Elche, and his third daughter,