The name India is derived from Indus, which is derived from the Old Persian word Hindu, from Sanskrit Sindhu (सिन्धु), the historic local appellation for the Indus River. The ancient Greeks referred to the Indians as Indoi (Ινδοί), the people of the Indus. The Constitution of India and usage in many Indian languages also recognises Bharat as an official name of equal status. The name Bharat is derived from the name of the legendary king Bharata in Hindu scriptures. Hindustan, originally a Persian word for "Land of the Hindus" and referring to North India and Pakistan before 1947, is also occasionally used as a synonym for all of India.