House of Braganza for a lifetime." He accepted the leadership of the rebellion, which was successful, and was acclaimed João IV of Portugal on 1 December 1640. After the accession of the Braganzas to the throne, the duchy was linked to the Crown. "Duke of Braganza" became the traditional title of the heir to the throne, together with Prince of Brazil and, later, Prince Royal of Portugal, much as Prince of Wales is in the United Kingdom or Prince of Asturias in Spain. Under D. João's sons D. Afonso VI and D. Pedro II, the Portuguese colonial empire, part of which was lost
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,