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 Infante John, Duke of Viseu Manuel I of Portugal Isabella of Viseu Eleanor of Viseu Partners Leonor de Sotomayor y Portugal
