Kubja Vishnuvardhana I "Vishama-Siddhi" whose Kannada name was Bittarasa [1][2](reigned 624–641 AD) was the brother of Chalukya Pulakeshin II.
[citation needed] Vishnuvardhana I ruled the Vengi territories in eastern Andhra Pradesh as the viceroy under Pulakeshin II from around 615 AD.
Pulakeshin II (608–644), the greatest Vatapi Chalukya king, conquered the eastern Deccan, corresponding the coastal districts of Andhra Pradesh 616, defeating the remnants of the Vishnukundina kingdom.
It was stated in the Kopparam plates that Kubja Vishnuvardhana was ruling only as a subordinate to his brother Pulakeshin II in the Vengi area.
Das Kornel posits that Pulakeshin II sent his younger brother Kubja Vishnuvardhana as viceroy to the Vengi region.