Arnab, Arnav or Arnov is a first name popular in India, and means "ocean" in Sanskrit. It also means "rabbit" in Arabic and Hebrew. Notable people with the name include:
- Arnab Basu (fl. 2000s), game designer, video-games producer; known for Tomb Raider series
- Arnab Chakrabarty (born 1980), classical musician and sarod player
- Arnab Chanda (born 1981), English born actor, writer, and director
- Arnab Das Sharma (born 1987), Indian footballer
- Arnab Goswami (born 1973), Indian journalist
- Arnab Mondal (born 1989), Indian footballer
- Arnab Nandi (born 1987), Indian first-class cricketer
- Arnab Rai Choudhuri (born 1956), Indian scientist
- Arnav (TV actor) (born Amjath Khan, 1989), Tamil television actor
- Arnav Kapur (fl. 2010s–2020s), computer scientist and engineer at MIT
- Arnav Sinha (born 1995), Indian cricketer