Keta or Betaraja was the earliest member of the dynasty of the Pallavas of Guntur. He secured the raddikam of Bezvada from Rajamahendra, the son of Rajendrachodaraja.This Rajamahendra (A.D. 1060-1063) was the son of Rajendra II (A.D 1052-1064), the younge brother of Rajadhiraja I (A.K. 1018-1064) and died as crown prince. Thus Kotaraja lived about A.D. 1060 and Bezvada constituted the nucleus of his kingdom.
His Political Relations
In this period, the hegemony of South India was divided between three powerful and ambitions monarchs who were given with unusually long reigns, to realise their ardent desires. They were Ananta varman of the Gangas, Vikramaditya of the Chalukyas and Kulottunga of the Cholas. In the Telugu country, many kingdoms were set up under the aegis of the Chalukya chol as, some of the rulers being Muppa I of the chagis of Gudimetta, Buddha I of the Kondapadumatis Ganda I of the Kotas of Amaravati, Vengisvara of the Chalukyas of Nidadavole, Dorapa of the Telugu pallavas of Nellore and Nannichoda I of the Telugu cholas of Konidena.
Keta had an younger brother Bangena also known as Tammubangi. Tammubangi is described in elaborate terms in the Yenamalakudunu inscription. The brothers Keta and Bengi—though do not seem to have come into conflict with any of the rulers mentioned above, claim to have disturbed the peace of the king of Jagallunthaka, whose identity is not known Probably Keta’s reign lasted till A.D. 1115 the earliest date for his successors.