autonym
/ˈɔːtənɪm/noun
1One's own name, a person's real name; especially the real name of an author, as distinguished from a pseudonym. Hence: a person who publishes a book under his or her own name; a book so published.
2 Cultural Anthropol. A name by which a people or ethnic group refers to itself; a self-designation.
Origin
Mid 19th century; earliest use found in Manchester Times. From auto- + -onym.