A pseudonym (/ˈsjuːdənɪm/ SEW-də-nim) is a name that a person or group assumes for a particular purpose, which can differ from his or her original or true name (orthonym). Pseudonyms include stage names, screen names, ring names, pen names, nicknames, aliases, superhero identities and code names, gamer identifications, and regnal names of emperors, popes and other monarchs.