Isabel of Braganza, Duchess of Guimarães Isabel of Braganza, Duchess of Guimarães Dona Isabel of Braganza (1514 – 16 September 1576) was a member of the House of Braganza, daughter of Jaime, Duke of Braganza (a nephew of Manuel I of Portugal) and Leonor Pérez de Guzmán. Isabel married her cousin Infante Duarte a son of Manuel I and Maria of Aragon in 1537. Isabel was dowried with the Dukedom of Guimarães, which had belonged to her brother Teodósio I, Duke of Braganza. After the marriage, Infante Duarte became the 4th Duke of Guimarães. Her younger daughter Catherine became the Duchess of Braganza and had a
Prince Luiz Gastão of Orléans-Braganza in Dreux. After his death, his sister Princess Pia Maria became the titular heir of her brother Pedro Henrique, until the birth of Pedro Henrique's son, also called Prince Luiz, in 1938. Prince Luiz Gastão of Orléans-Braganza Prince Luiz Gastão of Orléans-Braganza (; 19 February 19118 September 1931) was a member of the House of Orléans-Braganza, and was descended from the Brazilian Imperial Family. Prince Luiz Gastão was born at Cannes, France, the second son of Prince Luiz of Orléans-Braganza (1878–1920), and his wife, Princess Maria di Grazia of Bourbon-Two Sicilies (1978–1963). His father was the second son of Prince