In the inscriptions ascribed to period from the 3rd to the 11th century AD, the words Kammarashtram, Kammaratham, Kammakaratham, Karmarashtram, Karmakaratham, Karmakarashtram and Kammakarashtram were used interchangeably. The subsequent inscriptions of Telugu Chodas and Kakatiyas mentioned Kammanadu; for example, the Konidena inscription of Tribhuvana Malla from 1146.
