Ra' Diyaas ji was ruler of Junagadh in 1003-1010 AD. When king of Patan Durlabhsen Solanki attacks on junagadh but can not defeat the Fort of Uparkot , He sent His charan for get the Head of Ra' Diyaasji in donation, And Ra' Diyaas Donated his head to that Charan, Raa'Diyaas' and wife Somalde's son is Ra Navghan.
References
Ra' Diyaasji Wikipedia(Text) CC BY-SA