Question: Zwentibold was a member of a dynasty that was a Frankish noble family with origins in what clans?
Sentence (from "Carolingian dynasty"): The dynasty consolidated its power in the mid 8th century, eventually making the offices of mayor of the palace and "dux et princeps Francorum" hereditary, and becoming the "de facto" rulers of the Franks as the real powers behind the Merovingian throne.
Relevant evidence: No