They have been connected to the Khasas mentioned in the ancient Hindu literature. Historian Bal Krishna Sharma and Dor Bahadur Bista speculates that the Khas people were of Indo-European origin. Historian Baburam Acharya speculates that Khas are a sub-clan of Aiḍa, an Arya clan originated at Idavritt (modern day Kashmir). Khas were living in the Idavaritt in the 3rd millennium B.C.E. and the original meaning of the term Khas was Raja or Kshatriya (Yoddha). He further speculates that Kashmir has been named from its local residents Khas as Khasmir. In the 2nd millennium B.C.E., one group of Khas migrated towards Iran while the other group migrated east of Sutlej river settling only in the hill regions up to Bheri River. Historian Balkrishna Pokhrel contends that Khas were not the Vedic Aryans but Aryans of latter period like the Gurjara, Darada, Shaka, Pallava and Pisacha. He further asserts that post-Vedic Aryans were akin to Vedic Aryans in terms of language and culture.