A possible daughter of Hugo [VIII] is shown as possible wife of Otto in Europäische Stammtafeln, but the primary source on which this is based has not so far been identified. 1
Marriage Information:
Unnamed daughter of Graf Hugo VIII IM NORDGAU married Pfzgf. Otto II VON LOTHRINGEN, Herzog von Schwaben, son of Pfzgf. Ezzo VON LOTHRINGEN and Mathilda VON SACHSEN, Pfzgfn von Lothringen. (Otto II VON LOTHRINGEN died on 7 Sep 1047 in Tomburg.)
Sources
1 Foundation for Medieval Genealogy, Medlands: [daughter].