 Various historic inscriptions referring to the region have been found.A reference to "Karmarashtram" appears in the inscriptions of the Ikshvaku king Madhariputra Purushadatta (3rd century A.D) found at Bethavolu (Jaggayyapeta).Later ones include the inscription of the Pallava king Kumara Vishnu II, son of Buddha Varma found in the village of Chendaluru, and one of the Eastern Chalukya king Mangi Yuvaraja (627-696 AD) written in Sanskrit.