To which caste chamarthy belongs to?

the surname chamarthy belongs to niyogi brahmins.Actually they hail from coastal districts of andhrapradsh and are spread across world

Chamarthy Surname exists in Vaideki Velanadu families also from the coastal districts of AP. Example: Chamarthy from Vegeswarapuram (Near Kovvur) are Vaideki Velanadu brahmins..

Yes correct Some of the Chamarthy families are located at Vegeswarapuram. Chamarthy Nageswara Rao(Vaidiki Velanadu) was a land lord from Vegeswarapuram also he is a freedom fighter.