House of Braganza the prestige of the House of Braganza, although not leaving a significant mark on the House's history. The Duke notably ceded the Dukedom of Guimarães to Infante Duarte of Portugal as the dowry of his sister, Isabel of Braganza. Teodósio I's first son, Jaime of Braganza, died before he could inherit his father's titles, fighting alongside King Sebastião I at the Battle of Alcácer Quibir. The Duke's only daughter, Isabel of Braganza, married Miguel Luis de Meneses, 1st Duke of Caminha, though their union had no issue. Teodósio I's last child and successor, João I, lived a very different life
House of Braganza of Marquis of Vila Viçosa and Count of Neiva. Fernando I's children, by his wife, Joana de Castro, Lady of Cadaval, continued to enlarge the influence of the House of Braganza. Of his nine children, all six who survived to adulthood established themselves either through positions or marriages, though the actions of King João II would seek to weaken their influence. Fernando I's first son and successor, Fernando II, was initially a bright and popular nobleman, but his conflict with King João II would see his and the House's downfall. His second son, João of Braganza, 1st Marquis of Montemor-o-Novo,