Zwentibold was a member of a dynasty that was a Frankish noble family with origins in what clans?
Zwentibold Zwentibold ("Zventibold", "Swentiboldo", "Sventibaldo", "Sanderbald";  870 – 13 August 900), a member of the Carolingian dynasty, was the illegitimate son of Emperor Arnulf. In 895, his father, then king of East Francia, granted him the Kingdom of Lotharingia, which he ruled until his death. After his death he was declared a saint and martyr by the Catholic Church.
Rosenberg family The Rosenberg family (Rožmberkové in Czech, sg. "z Rožmberka") was a significant and influential Bohemian noble family, playing an important role in Czech medieval history from the 13th century until 1611. Members of this family held posts at the Prague royal (and later imperial) court and were viewed as very powerful lords of the Kingdom of Bohemia. This branch of the Vítkovci clan was initially founded by Vítek III, the son of Vítek (German "Witiko") of Prčice.