endonym

Also called autonym . the name that an ethnic, racial, or social group uses for itself or its language, such as Schwyzerdütsch for Swiss German.: Compare exonym (def. 2), ethnonym.

the name used to refer to a place by its inhabitants, as opposed to a name used by foreigners: In the 1920s, Reza Shah requested that the West call his country by its endonym “Iran,” rather than “Persia.”: Compare exonym (def. 1).