Rarh region () is a
toponym
Toponymy, toponymics, or toponomastics is the study of '' toponyms'' ( proper names of places, also known as place names and geographic names), including their origins, meanings, usage and types. Toponym is the general term for a proper name o ...
for an area in the
Indian subcontinent
The Indian subcontinent is a physiographical region in Southern Asia. It is situated on the Indian Plate, projecting southwards into the Indian Ocean from the Himalayas. Geopolitically, it includes the countries of Bangladesh, Bhutan, India ...
that lies between the
Chota Nagpur Plateau
The Chota Nagpur Plateau is a plateau in eastern India, which covers much of Jharkhand state as well as adjacent parts of Chhattisgarh, Odisha, West Bengal and Bihar. The Indo-Gangetic plain lies to the north and east of the plateau, and the b ...
on the West and the
Ganges Delta on the East. Although the boundaries of the region have been defined differently according to various sources throughout history, it is mainly coextensive with the state of
West Bengal
West Bengal (, Bengali: ''Poshchim Bongo'', , abbr. WB) is a state in the eastern portion of India. It is situated along the Bay of Bengal, along with a population of over 91 million inhabitants within an area of . West Bengal is the four ...
, also comprising parts of the state of
Jharkhand
Jharkhand (; ; ) is a state in eastern India. The state shares its border with the states of West Bengal to the east, Chhattisgarh to the west, Uttar Pradesh to the northwest, Bihar to the north and Odisha to the south. It has an area of . ...
in India. Linguistically, the region is defined with population speaking the
Rarh kudmali local dialect.
The Rarh region historically has been known by many different names and has hosted numerous settlements throughout history. One theory identifies it with the powerful
Gangaridai
Gangaridai ( gr, Γανγαρίδαι; Latin: ''Gangaridae'') is a term used by the ancient Greco-Roman writers (1st century BCE-2nd century AD) to describe a people or a geographical region of the ancient Indian subcontinent. Some of these writ ...
nation mentioned in the ancient
Greco-Roman
The Greco-Roman civilization (; also Greco-Roman culture; spelled Graeco-Roman in the Commonwealth), as understood by modern scholars and writers, includes the geographical regions and countries that culturally—and so historically—were dir ...
accounts. An inscription of
Vallalasena names it as the ancestral place of the