Duke of Braganza day than duchess for a lifetime". He accepted the leadership of the rebellion against Spain, which was successful, and was acclaimed King John IV of Portugal on 1 December 1640. After the accession of the House of Braganza to the Portuguese throne in 1640 as a replacement for the Philippine Dynasty of Spanish Habsburgs, the Dukedom of Braganza became linked to the crown. "Duke of Braganza" became the traditional title of the heir to the Portuguese throne, together with or alternate to "Prince of Beira", much as "Prince of Wales" is in the United Kingdom. After the 8th Duke had
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,