William the Victorious, Duke of Brunswick-Lüneburg Duke of Brunswick-Lüneburg and Prince of Calenberg (1392–1482) Parents Sophie of Pomerania Henry the Mild, Duke of Brunswick-Lüneburg Children Otto von Braunschweig-Lüneburg Frederick III, Duke of Brunswick-Lüneburg William IV, Duke of Brunswick-Lüneburg Siblings Catherine of Brunswick-Lüneburg Henry the Peaceful, Duke of Brunswick-Lüneburg Partners Mathilde von Holstein-Schauenburg Cecilia of Brandenburg
