Diogo I, Duke of Viseu Infante Diogo of Viseu (1450–1484) (1450–1484) Parents Infante Ferdinand, Duke of Viseu Infanta Beatrice, Duchess of Viseu Children Afonso de Viseu Siblings Isabella of Viseu Infante John, Duke of Viseu Manuel I of Portugal Eleanor of Viseu Partners Leonor de Sotomayor y Portugal
