The story
- Proto-Indo-European*dewh₂-der.?
- Proto-Italic*dwenos
- Old Latinduonus
- Latinbonum
- Old Galician-Portuguesebõo
- Portuguesebom
- Iberianbadia?
- Late Latinbaia
- Portuguesebaía
- PortugueseBombaim
- English todayBombay
From Portuguese Bombaim, possibly from Marathi मुंबादेवी (mumbādevī, “goddess Mumba”) or from bom + baim. Most likely a combination of both.
Etymology from Wiktionary, CC BY-SA 4.0.