A stage name or professional name is a pseudonym used by performers, authors, and entertainers—such as actors, comedians, singers, and musicians. Such professional aliases are adopted for a wide variety of reasons and they may be similar, or nearly identical, to an individual's birth name. Though uncommon, some performers choose to adopt their stage name as a legal name.
Marilyn Monroe (born Norma Jeane Mortenson) created her stage name by combining her mother's maiden name with the first name of Broadway star Marilyn Miller. It became her legal name in 1956.
Madhubala (born Mumtaz Jehan Begum Dehlavi) was suggested for her stage name by Indian director Mohan Sinha, who launched her as a full-fledged leading star after a series of bit roles.
Singer Freddie Mercury legally changed his name from Farrokh Bulsara.
A pseudonym or alias is a fictitious name that a person assumes for a particular purpose, which differs from their original or true name (orthonym). This also differs from a new name that entirely or legally replaces an individual's own. Many pseudonym holders use them because they wish to remain anonymous, but anonymity is difficult to achieve and often fraught with legal issues.
A young George Sand (real name "Amantine Lucile Dupin")