endonym

As nouns the difference between endonym and demonym

is that endonym is 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 while demonym is a name for an inhabitant or native of a specific place that is derived from the name of the place.

As nouns the difference between taxonomy and endonym

is that taxonomy is the science or the technique used to make a classification while endonym is 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.