Pseudonym (noun)

1. A name used by a person instead of their real name, especially by an author.
2. A fictitious name assumed by an author.

Origin:

From greek pseudōnymos "having a false name", from pseud- "false" + onoma "name".

Examples:

1. The author used a pseudonym to protect her identity.
2. She published the novel under a pseudonym.
3. The musician adopted a pseudonym to hide his true identity.
4. The artist used a pseudonym to avoid recognition.
5. The scientist used a pseudonym to conceal his identity.