https://en.wikipedia.org/wiki/Hedwig_of_Nordgau

Hedwig of Nordgau was the wife of Siegfried of Luxembourg, first count of Luxembourg and founder of the country. They were married c. 950.[1] She was of Saxon origin but her parentage is not known for sure. Some sources list her as the daughter of count Eberhard IV of Nordgau and Luitgard of Lotharingia.[2] Others claim that she was connected to the family of Otto I, Holy Roman Emperor.[3] Described as "saintly" herself, Hedwig of Nordgau was the mother of Saint Cunigunde of Luxembourg, the seventh of eleven children from her marriage to Siegfried.[4]