Namaskar,
this is my 3rd month studying history of Bhargava and kaushika Tribes of Brahmins of India.
today, i found this piece of work were the author have claimed that vishvamitras/Kaushikas are originally from border Regions of Iran and Afghanistan from a unknown place called Aria Palus...
Namaskar,
i had to start a new thread because these clans share similar characteristics and (dare i say) origins which is different from Vedic Clans (puru,kauravas ?).
https://en.wikipedia.org/wiki/Panchala_Kingdom_(Mahabharata)#Partition_of_the_Panchala_Kingdom