Agnes of Brunswick-Lüneburg Princess of Rügen (1246–1302) Parents Matilda of Brandenburg, Duchess of Brunswick-Lüneburg Otto the Child Children Sambor Euphemia of Rügen Margaret von Rügen Sophie von Rügen Helene von Rügen Jaromar Vitslav III, Prince of Rügen Swentopolk von Rügen Siblings Mathilde of Brunswick-Lüneburg Adelaide of Brunswick-Lüneburg John, Duke of Brunswick-Lüneburg Otto I of Brunswick-Lüneburg Helene of Brunswick-Lüneburg Elisabeth of Brunswick-Lüneburg Conrad of Brunswick-Luneburg Albert I, Duke of Brunswick-Lüneburg Partners Vitslav II, Prince of Rügen