Pseudonym

Fictitious name assumed for a particular purpose

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 and maintain privacy, though this may be difficult to achieve as a result of legal issues.

This keyword could refer to multiple things. Here are some suggestions: