It came to be associated with the historical Kamarupa after Bhaskaravarman of the Varman dynasty by drawing his lineage from Naraka/Bhagadatta of the legendary Pragjyotisha to bring his peripheral kingdom closer to mainland traditions at a time when he was emerging as a powerful king with interests in North India.
Bhaskaravarman of the Varman dynasty established a connection with the historical Kamarupa by tracing his lineage from Naraka/Bhagadatta of legendary Pragjyotisha, integrating his kingdom with mainland traditions during a time when he was gaining power and interests in North India.