Arnab or Arnob meaning "ocean" in Bengali language and Assamese language is a given name. Notable people with the name include:
Arnab Basu, 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 Jan Deka (born 1967), Indian novelist
Arnab Goswami (born 1973), Indian journalist
Arnob Mitra (born 1991), Bangladeshi singer
Arnab Mondal (born 1989), Indian footballer
Arnab Nandi (born 1987), Indian first-class cricketer
Arnab Ray, better known as Greatbong, Indian novelist
Arnab Rai Choudhuri (born 1956), Indian scientist
Shayan Chowdhury Arnob (born 1979), Bangladeshi musician
