Beatrice was the daughter of Herbert I, Count of Vermandois. She was also the sister of Herbert II, Count of Vermandois, and was a descendant in the male line of Charlemagne through King Bernard of Italy.
Beatrice was the child of Herbert I, Count of Vermandois. She was the sibling of Herbert II, Count of Vermandois, and belonged to the lineage of Charlemagne through King Bernard of Italy.