Rajputization
The Chandel Rajputs were originally Hinduised Bhars or Gonds or both. When they became politically powerful, they became  Kshatriyas or Rajputs. The Gaharwars similarly are associated with the Bhars, the Bundelas and the northern Rathors are offshoots of the Garhawars. The Dharmasastras recognise the possibility of lower castes being elevated to higher castes.