Isabella of Braganza, Lady of Reguengos de Monsaraz Portuguese noble (1402–1466) Parents Beatriz Pereira de Alvim Afonso I Children Isabella of Portugal Diogo, Constable of Portugal Infanta Beatrice, Duchess of Viseu Siblings Fernando I, Duke of Braganza Afonso, Marquis of Valença Partners John, Constable of Portugal
