From: Rajan Menon
Genetics and the linguistic issue of the populations of Greater India:
From this point in genetic fission two major clusters follow:
(1) The first major cluster divided into two sub-groups:
a) The Munda- north Dravidian forms a sub-group and a second sub-group being comprised of two Dravidian combinations. These are (i) The Chenchu Reddy. the Konda, the Koya and Gondi along with other smaller units. And (ii) the Kolami-Naiki, the Parji and others.
The north Dravidian speakers are the Oraon who form a substantial population amounting to approximately 24 million.
The others are the Raajbhanshi, the Bhil and a mini sub-group consisting of the Marathan and the Maharashtrian brahmin.