The name India is derived from Indus, which originates from the Old Persian word Hindu. The latter term stems from the Sanskrit word Sindhu, which was the historical local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi , which translates as "the people of the Indus". The geographical term Bharat ), which is recognised by the Constitution of India as an official name for the country, is used by many Indian languages in various subtle guises. The eponym of Bharat is Bharata, a mythological figure that Hindu scriptures describe as a legendary emperor of ancient India. Hindustan was originally a Persian word that meant "Land of the Hindus"; prior to 1947, it referred to a region that encompassed northern India and Pakistan. It is occasionally used to solely denote India in its entirety.