Nom d'emprunt.
ETYM Cf. French pseudonyme. Related to Pseudonymous.
(from Greek “false name”) Name assumed in order to conceal identity or because it sounds better or more suitable for professional purposes than the person’s own name.
Assumed name.
A fictitious name used when the person performs a particular social role; SYN. anonym, nom de guerre.
ETYM Greek; pseydes false + onom a name: cf. French pseudonyme. Related to Pseudo-, and Name.
Bearing or identified by an assumed (often pen) name.