Question

name one of the earliest sources where the name 'bharatavarsha' was first mentione​

Answer 1

Answer:

According to the Bhagavata Purana, before India was called Bharatvarsha, it was known as Nabhivarsha. Tianzhu or Tenjiku is the historical East Asian name for India that comes from the Chinese transliteration of the Persian 'Hindu', which itself is derived from the Sanskrit Sindhu, the native name of the Indus River.

They called 'Indus' for the Sindhu river and, accordingly, 'India' for Hindustan or Bharatvarsh. Thus, the words Hindu and India became popular. ... It is known as Bharatvarsha, or the land of Bharat where the descendants of Bharata live. Bharata was a king highly praised in Puranas.