[1][2][3][4][5] The word Sinsinwar was originated from the name of village Sinsini, to which ancestral lineage of Bharatpur rulers belong.
[6] The Sinsinwar rulers of the Bharatpur dynasty claimed their descent from Balchand, a Yaduvanshi Rajput of Jadaun clan.
Balchand's wife was infertile, so he had two sons named Vijje and Sijje with a Jat concubine whom he had captured during one of his usual plundering raids.
His sons became Jats and adopted Sinsinwar as their gotra based on the village of Sinsini after being rejected as Rajputs.
Historian Ram Pande notes several issues when examining the veracity of this legend: Sinsini had never been part of Karauli State, the caste of a child is not based on the mother's caste, and they would have become Darogas when rejected as Rajputs instead of Jats.