Definition from Wiktionary, the free dictionary
demonym (plural demonyms)
- (rare) A name for an inhabitant or native of a specific place that is derived from the name of the place.
- Why is it that people from the United States use American as their demonym?
- (obsolete) A pseudonym formed of an adjective.
- The Logophile has my favourite demonym, I would write under it if he didn't.
Usage notes 
name for an inhabitant or native of a specific place
pseudonym formed of an adjective
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