Henry the Peaceful, Duke of Brunswick-Lüneburg Duke of Brunswick-Lüneberg; Prince of Lüneburg, then Prince of Wolfenbüttel (1411–1473) Parents Henry the Mild, Duke of Brunswick-Lüneburg Margaret of Hesse Children Margarethe von Braunschweig-Wolfenbüttel Siblings William the Victorious, Duke of Brunswick-Lüneburg Catherine of Brunswick-Lüneburg Partners Helen of Cleves