John IV, Marquess of Montferrat Italian Marquess (1413–1464) Parents Joan of Savoy John Jacob, Marquess of Montferrat Children Margaret Palaiologina of Montferrat Siblings Teodoro Paleologo di Montferrato Amadea Palaiologina of Montferrat Isabella Palaiologina of Montferrat Boniface III William VIII, Marquess of Montferrat Partners Margaret of Savoy, Countess of Saint-Pol