Autonym

Noun

1. An infraspecific name in which the specific epithet is repeated.
2. A name used by a group or category of people to refer to themselves or their language, as opposed to a name given to them by other groups.

   "Deutsche is the autonym of the people known in English as Germans."

3. The true name of a person or other entity, especially an author.
4. A work published under the author's true name.