Although the name Ponka did not appear in history before 1700 it must have been used for many generations earlier, since it is an archaic designation connected with the social organization of several tribes and the secret societies of the Osage and kansa, as well as the Ponka.
"The Siouan Indians"
W. J. McGee
The substitution of Krishna, born as a prince, for Jasoda's daughter, in order to protect him from destruction by the evil king kansa of Mathura, is perhaps a later gloss, devised when his herdsman parentage was considered too obscure for the divine hero.
"The Tribes and Castes of the Central Provinces of India Volume II"
R. V. Russell
The name is probably derived from kansa, bell-metal, as these Banias retail brass and bell-metal vessels.
"The Tribes and Castes of the Central Provinces of India Volume II"
R. V. Russell