Individuals with Patharkar surname are mostly found in the following states, Maharashtra, Madhya Pradesh, Gujarat and Karnataka India.
Most Patharkars are Deshastha Brahmins by caste. The surname is also found amongst other Hindu castes and communities of Maharashtra.
Individuals with the last name Patharkar speak Marathi as their mother tongue along with other regional and national languages.
References
Patharkar Wikipedia(Text) CC BY-SA