Examples
“But what you may not know is that a name commonly given to the residents of a place is called a demonym (from Greek demos, the people, + - nym, name).”
“Is just that the Usa didn't found a original demonym for themselves so they try to use the term American as if they were the only ones.”
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“Portuguese dictionaries define the demonym latino to refer to natives of Romance-speaking nations influenced by Roman civilization, and to the natives or inhabitants of ancient Latium modern Lazio.”
“This demonym (derived from the name of the messenger of the gods in Greek mythology) was introduced by Arthur C. C.arke in his novel”
“38 In these languages, latino, just like any other demonym, is by convention not capitalized.”
“We accept that the demonym for someone from the United States of America is American, but the country can’t simply be called “America”, there are too many other claims on that name.”
“a location poll of Viva El Birdians (note to self: come up with better demonym); what surprised me most wasn't the five votes outside the continental US but the eight votes from”

mialuthien demonym – a demonym or gentilic is a word that denotes the members of a people or the inhabitants of a place; in English, a demonym is often the same as the name of the people's native language: e.g., the "French" (people from France) Jul 18, 2008
pterodactyl "And if there's one thing that the candidates want to show they really know about Indiana, it's the local demonym..." (i.e. Hoosier.)
--Heard on NPR, in this story. Apr 18, 2008
john Words that describe the inhabitants of a place. See this list for a bunch of examples. Dec 24, 2007