William IV, Duke of Brunswick-Lüneburg Duke of Brunswick-Lüneburg, Prince of Wolfenbüttel and Göttingen (1425–1503) Parents Cecilia of Brandenburg William the Victorious, Duke of Brunswick-Lüneburg Children Henry IV, Duke of Brunswick-Lüneburg Eric I, Duke of Brunswick-Lüneburg Anna von Braunschweig-Wolfenbüttel Siblings Frederick III, Duke of Brunswick-Lüneburg Otto von Braunschweig-Lüneburg Partners Elisabeth, daughter of count Botho VII of Stolberg-Wernigerode