Background
Helen was the youngest daughter of Valdemar I of Denmark and Sophia of Minsk.
Helen was the youngest daughter of Valdemar I of Denmark and Sophia of Minsk.
She is the ancestress of all later Guelphs. She was the sister of the Kings Canute VI and Valdemar II and Queen Ingeborg. Helena and William had one son, the future Duke, Otto I, The Child of Brunswick-Lüneburg (1204–1252).
Duchess Helene died in 1233 and was buried in the Benedictine monastery of Saint Michael in Lüneburg.