Diogo, Constable of Portugal

Diogo of Portugal (1425–1443) was a Portuguese royal prince, who briefly served as Constable of Portugal and Master of the Order of Santiago. Diogo was the eldest son of John, Lord of Reguengos de Monsaraz, Infante of Portugal, and of his wife (and niece) Isabella of Barcelos. Through his father, Diogo was the grandson of King John I of Portugal and through his mother, the grandson of Afonso of Barcelos (future first duke of Braganza).

Diogo, Constable of Portugal

Diogo of Portugal (1425–1443) was a Portuguese royal prince, who briefly served as Constable of Portugal and Master of the Order of Santiago. Diogo was the eldest son of John, Lord of Reguengos de Monsaraz, Infante of Portugal, and of his wife (and niece) Isabella of Barcelos. Through his father, Diogo was the grandson of King John I of Portugal and through his mother, the grandson of Afonso of Barcelos (future first duke of Braganza).