John, Constable of Portugal Portuguese prince and Constable of Portugal (1400–1442) (1400–1442) Parents Philippa of Lancaster John I of Portugal Children Isabella of Portugal Diogo, Constable of Portugal Infanta Beatrice, Duchess of Viseu Siblings Peter, Duke of Coimbra Isabella of Portugal, Duchess of Burgundy Prince Henry the Navigator Afonso I Edward I of Portugal Ferdinand the Holy Prince Beatrice, Countess of Arundel Blanca de Aviz Afonso de Portugal Partners Isabella of Braganza, Lady of Reguengos de Monsaraz
