penname
/ˈpɛnˌneɪm/Definitions
1. noun
A pseudonym or assumed name used by an author, artist, or writer.
“The author’s penname was a clever combination of her initials and her favorite flower.”
2. noun
A name adopted by a person for a particular purpose, such as a business or a hobby.
“The entrepreneur chose a penname for her online persona to create a professional image.”