Origin
The Rehvar are originally Parmar who came from Ujjain and settled in Chundravati. They then migrated to Tharparkar in Sindh, and then moved to Banaskantha. The Rehvar were rulers of the states of Bolundra, Mohanpur, Ranasan, Rupal, and Wadagam. The community is found mainly in Saurashtra and north Gujarat.
References
Rehvar Wikipedia(Text) CC BY-SA