The city was called both names for centuries; the Marathi-language locals called it
Mumbai, English-speakers called it
Bombay. Which came first is not easily determined. Some say that
Bombay is the anglicized corruption of the pre-existing local name,
Mumbai. However, the Portuguese, who arrived in the area before the British, called the city
Bombaim. As the
wikipedia entry on this subject points out,
Bombaim probably derived from a Portuguese name meaning "good bay." In other words, I believe
Bombay is the anglicized version of
Bombaim and not
Mumbai.
In 1996, the ruling, Hindu-nationalist, Shiv Sena state government renamed the city to
Mumbai in the English version as well, as part of a rash of colonial rejection that swept India. This moronic "restoration" disease was responsible for such atrocities as changing
Calcutta to
Kolkata (the local Bengali name),
Madras to
Chennai (Tamil), and
Bangalore to
Bengaluru (Kannada). Substituting symbolism for competence, these state governments sought to restore their cultural "pride" as a step to solving all the nation's problems. Read
here for more gory details about the loaded reasons for these name changes.
This "logic" has also extended from time to time to the idea of making Hindi the sole official language of India, an honor it shares with English. Unsurprisingly, several regional groups (including the Tamilians and Kannadigas) have rioted at this brazen attempt by the Hindi-speaking "Northies" to suppress regional cultures.
Wonder why I persist in calling it
Bombay? The name
India itself is derived from the Greek characterization of the area where the Indus river is located, which dates to at least the time of Alexander the Great. Try and remove all the "foreign" influences and what have you left?
Perhaps these Indian "nationalists" should redirect their energies to upgrading the country's police forces, like, I dunno, giving them some real guns instead of the
World War I-era, .303 Enfield rifles that they carry, if they're lucky enough to have one. Seriously, these are
collectibles: