In V. 700 Acharya Shri Yashodeo Siri arrived in Jetpur. At that time King Jayantsingh Chauhan was the ruler. His son became blind. King went to the Acharya and requested him to cure the prince. Acharya placed the condition that if you convert yourself and become Oswal Jain, then he could help him. King accepted the proposal.
Acharya invoked the Dev Vangdev and requested him to cure the prince. Dev gave the light to the prince’s eyes. The faily of the king was thus named Vangani.