Otto III Duke of Brunswick-Lüneburg (1296–1352) Parents Mathilda of Bavaria Otto II, Duke of Brunswick-Lüneburg Children Otto von Braunschweig-Lüneburg Elisabeth von Braunschweig-Lüneburg Matilda of Brunswick-Lüneburg Siblings William II, Duke of Brunswick-Lüneburg Ludwig von Braunschweig-Lüneburg Sophie of Brunswick-Lüneburg John of Brunswick-Lunebourg Mathilde of Brunswick-Lunebourg Luitgard of Brunswick-Lüneburg Jutta von Braunschweig-Lüneburg Partners Maud of Mecklenburg