The name in Indian languages is Bharata after the emperor Bharata. At first the name Bharata referred only the western part of the Gangetic Valley in North India, but was later more broadly applied to the Indian subcontinent and the region of Greater India, as was the name India. Today it refers to the contemporary Republic of India located therein. The name India is originally derived from the name of the river Sindhu (Indus River) and has been in use in Greek since Herodotus (4th century BCE). The term appeared in Old English as early the 9th century and reemerged in Modern English in the 17th century.
The Republic of India has two principal short names in both official and popular English usage, each of which is historically significant, India and Bharat. The first article of the Constitution of India states that "India, that is Bharat, shall be a union of states," implicitly codifying India and Bharat as equally official short names for the Republic of India. A third name, Hindustan as an alternative name for the region comprising most of the modern nations of the subcontinent when Indians speak among themselves. The usage of Bharat, Hindustan or India is dependent on the context and language of conversation.
Although the Aryavarta was eventually accepted as a term for all of India, previously it was only a name of the Indo-Gangetic Plain. According to Manusmṛti North India (i.e., India north of the Vindhyas) is also known as Āryāvarta (Sanskrit: आर्यावर्त, abode of the Vedic people).
The English term is from Greek Ἰνδία (Indía), via Latin India. Indía in Koine Greek denoted the region beyond the Indus (Ἰνδός) river in the Pakistan, since Herodotus (5th century BC) ἡ Ἰνδική χώρη, hē Indikē chōrē; "the Indian land", Ἰνδός, Indos, "an Indian", from Old Persian Hinduš and listed as a conquered territory by Darius I in the Persepolis terrace inscription. The name is derived ultimately from Sindhu, the Sanskrit name of the river which is a part of Pakistan today, but also meaning "river" generically. Latin India is used by Lucian (2nd century AD).