Helena of Denmark heiress of Garding and by marriage Duchess of Lüneburg (1180–1233) Parents Sofia of Minsk Valdemar I of Denmark Children Otto the Child Siblings Richeza of Denmark Sophie of Denmark Canute VI of Denmark Valdemar II of Denmark Ingeborg of Denmark, Queen of France Marie Valdemarsdottir Margaret Valdemarsdottir Christopher of Jutland Partners William of Luneburg