Sophie of Brunswick-Lüneburg Parents Mathilda of Bavaria Otto II, Duke of Brunswick-Lüneburg Children Siblings Otto III John of Brunswick-Lunebourg William II, Duke of Brunswick-Lüneburg Mathilde of Brunswick-Lunebourg Luitgard of Brunswick-Lüneburg Jutta von Braunschweig-Lüneburg Ludwig von Braunschweig-Lüneburg