The character in Cyrano de Bergerac is spelled with just one n: Roxane. Alexander the Great's first wife was Roxane, a Bactrian princess.
Pop Culture References for the Name Roxanne
Roxanne Ritchie, character from the animated film Megamind (voiced by TinaFey)
Roxanne Bojarski, character on the show American Dreams
Roxanne, song by The Police Tango de Roxanne, a song from the movie Moulin Rouge
Roxanne, the Rustboro City Gym Leader in Pokemon Ruby