Question DII: Can't dance your way around this

A happy Republic Day to all.

“A patriot must always be ready to defend his country against his government.”

Edward Abbey

Now on to the question

The picture below shows the extent of the kingdom of __X__, who is said to have unified the subcontinent under one kingdom.

In the Vedas, __X__ is described as follows

abhūtir eṣā kas tyajyāj jīvañ jīvantam ātmajam

śākuntalaṃ mahātmānaṃ dauḥṣantiṃ bhara paurava

bhartavyo 'yaṃ tvayā yasmād asmākaṃ vacanād api

tasmād bhavatv ayaṃ nāmnā bharato nāma te sutaḥ

Therefore, O thou of Puru's race, cherish thy high-souled son born of __Y__

and because this child is to be cherished by thee even at our word,

therefore shall this thy son be known by the name of ___X___.

 But others argue that the __X__ race, an Ayan tribe mentioned in the Rigveda were successful against other Aryan and Non-Aryan tribes. Thus in the post Vedic tradition, they were deemed as conquerors of all, and hence all was known as __X__.

Question:

1) ID X

2) ID its contribution to the world today (exact answer required).

3) Brownie points for explaining the connection to the title

ANSWER:


X- BHARATA
Y- OFFICIAL NAME OF INDIA
Z- Bharatnatyam, although thats specious as the Bharats in both are not the same.
Bharata Natyam comes from the words Bhava (Expression), Raga (Music), Tala (Rhythm) and Natya (Classic Indian Musical Theatre). 


Since it was Republic Day, i'll be generous & give full point for only Bharat/Bharata