penname
nounUK /ˈpen.neɪm/
US /ˈpen.neɪm/
A penname is a made-up name that a writer uses instead of their real name.
The author wrote her mystery books under a penname.
OTHER MEANINGS
2. A name used to hide a person's true identity in public.
The famous singer checked into the hotel using a penname.
3. A nickname chosen by someone for professional work.
He published his science articles under a penname.
4. A borrowed name used on letters or documents.
The spy signed the letter with a penname.