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Wiktionary
endonym

n. 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. For example, ''Deutsche'' is the endonym of a people known in English as ''German'' and Mapuche is the endonym for the people referred to by outsiders as Araucanos.

Wikipedia
Endonym
  1. redirect exonym and endonym