Question: Kadava was the name of a Tamil ruling dynasty who ruled parts of the Tamil country during the thirteenth and the fourteenth century, it was at the height of their power briefly during the reigns of Kopperunchinga I and Kopperunchinga II, the two rulers were powerful enough to challenge the waning Chola dynasty, was one of the longest-ruling dynasties in the history of the southern region, of which country?
Sentence (from "Chola dynasty"): The earliest datable references to this Tamil dynasty are in inscriptions from the 3rd century BCE left by Ashoka, of the Maurya Empire.
Relevant evidence: No