Sir G.Grierson states that the Korwa dialect is closely allied to Kharia.

Similarly the resemblance of the name raises a presumption that the great Koli tribe of Gujarat and western India may be a branch of the Kols who penetrated to the western coast along the Satpulra and Central India hill ranges.

The Kolis and Bhils are tribes of the same country and are commonly spoken of together.

Both have entirely lost their own language and cannot therefore be classified definitely either as Kolarian or Dravidian, but there is a probability that they are of the Kolarian family.

The Nahals, another tribe of the western Satpura range, are an offshoot of the Korkus.