Alias (noun)

A false or assumed name used by someone.

Origin:

From latin alius, meaning "other" or "another". it entered english in the late 16th century.

Examples:

1. The criminal used an alias to avoid detection.
2. The author published the book under an alias.
3. The spy used many aliases during her career.
4. The actress changed her name to an alias when she entered the film industry.
5. The person used an alias to protect his identity.