Origin: Greek prefix pseudo-
Pseudonym has 2 different meanings across 1 category:
a fictitious name used when the person performs a particular social role
A fictitious name (more literally, a false name), as those used by writers and movie stars.
The word "pseudonym" comes from the French adjective pseudonyme, which traces back to Ancient Greek. It combines elements meaning "false" and "name," originally referring to a false or assumed name.