In 1942, the Duarte Nuno married Maria Francisca de Orléans e Bragança, daughter of Pedro de Alcântara, Prince of Grão-Pará. Their marriage reconciled two branches of the House of Braganza, in two different ways, reuniting the Portuguese and Brazilian Brigantine houses and specifically reuniting the Miguelist and Liberal Braganzas, which had been estranged since 1828, when the War of Two Brothers was waged between King-Emperor Pedro IV &amp; I, founder of the Liberal Braganzas, and King Miguel I, founder of the Miguelist Braganzas. The couple had three sons, the eldest of whom is Duarte Pio de Bragança, the current pretender to the defunct Portuguese throne.