autonyms

/ˈɔːtənɪmz/
noun
  1. Names that a group or person uses for themselves, as opposed to names given by outsiders.
    • The autonyms used by indigenous tribes often differ from the names colonizers gave them.
    • Linguists study autonyms to understand how communities identify themselves.
    • Many countries have autonyms that are not widely known in English.
Antonyms
What does "autonyms" mean? | whatsthatwordmean | whatsthatwordmean