Adelaide of Montferrat (1237-1285) (1237–1285) Parents Margaret of Savoy Boniface II, Marquess of Montferrat Children William I, Duke of Brunswick-Lüneburg Albert II, Duke of Brunswick-Lüneburg Henry I, Duke of Brunswick-Grubenhagen Conrad von Braunschweig Otto von Braunschweig Matilda of Brunswick-Lüneburg Luther von Braunschweig Siblings William VII, Marquess of Montferrat Partners Gerhard I, Count of Holstein-Itzehoe Albert I, Duke of Brunswick-Lüneburg