Sanatan Dharma
Sanatan Dharma is also known by its alternate name of Hinduism.
The name 'Sanatan Dharma' is given to the religion of the Indian subcontinent in the Vedic period. 'Sanatan' means 'eternal' or 'everlasting', that is, one who has neither beginning nor end.
Sanatan Dharma is essentially an Indian religion, which at some point was widespread throughout Greater India (Indian subcontinent).
Even after heavy conversions due to various reasons, majority of the population of this region of the world believes in this religion.