The name mumbai is derived from Mumba or Maha-amba - the name of the Koli goddess Mumbadevi and Aai, "mother" in the language of Marathi, The mother of tongue of the Kolis.
The oldest known names for the city are kakamuche and Galajunkja; these are something still used.
The English name was officially chrnged to mumbai in 1995.
