Dulo clan
The 17th century Volga Bulgar compilation "Cäğfär Taríxı" (a work of disputed authenticity) represents Karadžam (i.e., Kardam) as the brother of Azan Tokta (i.e., Toktu), and as the grandson of Suvar (Sevar). The same source represents his successor Korym (i.e., Krum), as his nephew. If all this is correct, Kardam's accession signifies the final restoration of the Dulo clan, which would have retained the throne until the death of Roman in 997.