Nairobi is the capital and largest city of Kenya. The city and its surrounding area also forms the Nairobi County. The name "Nairobi" comes from the Maasai phrase Enkare Nairobi, which translates to "cold water," the Maasai name of the Nairobi river, which in turn lent its name to the city. However, it is popularly known as the "Green City in the Sun" and is surrounded by several expanding villa suburbs. Residents of Nairobi are known as Nairobians.