House of Babenberg
The designation "Babenberger", from the castle of Bamberg "(Babenberch)", was established in the 12th century by the chronicler Otto of Freising, himself a member of the Babenberg family. The later House of Babenberg, which ruled what became the Duchy of Austria, claimed to come of the Popponid dynasty. However, the descent of the first margrave Leopold I of Austria († 994) remains uncertain.