Sivakara Deva I was a monarch who joined the forces of Rarh from the modern Bankura district and married the queen of Rarh kingdom Jayavallabhi.
Maharaja Sivakara Deva I or Sivakara Unmattasimha/ Unamattakeshari was a powerful monarch of the Bhaumakara Dynasty who ruled in the late tertiary part of the 8th century A.D. Sivakara Deva I marched with a huge army on Rarh and conquered the opponent after a high pitched battle with the forces of Rarh which was situated in the northern part of the Bhaumakara territory. Historian R.C.Banarjee identifies the mention of Rarh in the Bhaumakara inscription with the territory that comprised around the modern Bankura district confined between the rivers Ajay and Rup Narayan. He married Jayavallabhi who was the princess of Rarh kingdom after defeating the enemy. 
