Did you possibly mean eponym?
Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A name by which one people or social group refers to another and by which the group so named does not refer to itself.
Wiktionary
- n. A name given to a group or category of people by a secondary person or persons other than the people it refers to.
Etymologies
- exo- (“outside”) + -onym (“name”) (Wiktionary)
Examples
“After reading various posts and letters in online forums on the issue, I can see that the word Eskimo has been blown out of proportion from an innocent exonym to something that people will defend against with fists flying.”
“In the case of Charun, perhaps it might then be said that he is an exonym, simply a functional subset or aspect of Turms.”
“Historically, Iraq was known in Europe by the Greek exonym 'Mesopotamia' (Land between the rivers), after the foundation of the Kingdom of Iraq in”
WN.com - Articles related to Biden seeks thaw between Iraqi political rivals
“Historically, Iraq was known in Europe by the Greek exonym 'Mesopotamia' (Land between the rivers), after the foundation of the Kingdom of Iraq in 1932, it became known by its ancient endonym 'Iraq'.”
WN.com - Articles related to Biden seeks thaw between Iraqi political rivals
“WWII began a year later; Sudetenland was restored to Czechoslovakia after the war. exonym (a name used by outsiders).”
“Europe by the Greek exonym 'Mesopotamia' (Land between the rivers), after the foundation of the Kingdom of Iraq in 1932, it became known by its ancient endonym 'Iraq'.”
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“An exonym is a name that is applied to an ethnic group by another group or groups of people.”
“Попа - Не искам аз друга да обичам "Romani music (often referred to as Gypsy-Gipsy music, which, in other contexts, the Romani consider a derogatory term) is the music of the Romani people (also Romany, Romanies, Romanis, Roma or Roms; exonym: Gypsies; Romani: Romane or”
WN.com - Articles related to Expulsion of Roma Raises Questions in France
Lists
These user-created lists contain the word ‘exonym’.
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Word Words
This used to be my nym list, but there are so many words about words, I think it's time to expand and open.
acronym, antonym, aptronym, autoantonym, autonym, bacronym, capitonym, contranym, contronym, eponym, exonym, heteronym and 120 more...
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phrontistery - e
from phrontistery.info
eagre, earing, earwig, easement, eau-de-nil, ebberman, ebeneous, ?boulement, ebriection, ?brillade, ebrious, ebullioscope and 616 more...
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WF - Word Formation Words
Classes of words and types of word formation
sniglet, protologism, portmanteau word, blend, telescope-word, frankenword, double-entendre, compound, derivative, palindrome, spoonerism, malapropism and 152 more...
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cicatrix
scar tissue
minatory, naira, Cluniac, embracive, prolix, hierophant, timorous, adduce, veracious, dysphoric, sang-froid, vitiate and 503 more...
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Names for Names
Source and definitions: http://phrontistery.info/name.html
acronym, allonym, ananym, anonym, antonym, aptronym, autonym, caconym, cohyponym, cryptonym, dionym, eponym and 26 more...
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-onym, -onymous, -onymic
denoting or relating to names
acronym, synonymous, patronymic, antonym, ananym, anonym, aptronym, autonym, caconym, cohyponym, cryptonym, dionym and 29 more...
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Nyms
synonym, antonym, eudonym, retronym, homonym, womonym, ananym, aptronym, autoantonym, bacronym, capitonym, endonym and 16 more...
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bintalshamsa's list
My Favorite Words
weltschmerz, perspicacity, idée fixe, invigilator, salubrious, tchotchke, ex nihilo, invidious, malapropism, naïve, sardonic, elide and 1401 more...
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AbraxasZugzwang's Words
atavism, abraxas, sisyphean, frust, fetus-in-fetu, arhythmically, queef, epidemiology, abecedarian, troglodyte, chiaroscuro, philology and 631 more...
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timrmortiss's list
compotation, deodand, lignify, obstreperous, noetic, promantia, nostrum, cynosure, sesquipedalian, callipygian, inchoate, hortatory and 93 more...
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words
diplopic, dolorous, farrago, surety, scuttlebutt, Arabesque, infarct, neurasthenia, lambent, expurge, univocal, simper and 395 more...
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rememberers
prolix, ageusia, animadversion, anodyne, antic, arabesque, beadle, brachymetropia, colophon, desquamation, diaphoresis, diegesis and 3248 more...
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Grammar
Terms that would be good to know.
homonym, womonym, aptronym, autoantonym, bacronym, capitonym, exonym, heteronym, oronym, patronym, pseudonym, retronym and 62 more...
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Words I Had to Look Up
Words whose definitions or spellings I didn't know at first glance go here.
rogation, asthenosphere, imprecation, glossus, rhodomontade, aptronym, bacronym, capitonym, exonym, heteronym, oronym, retronym and 51 more...
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Words I've learnt through Wordie.
A list of words I've looked up since cleaning up my Wordie. These have been found around here.
idempotent, autoantonym, exonym, aptronym, ananym, heteronym, toponym, autochthonous, crepuscular, oronym, oronym, retronym and 9 more...
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just because
Not all English. Apologies.
bongo-bongoism, spiv, igg, wormwood, umbra, circean, woodnote, dormouse, ben trovato, exonym, apologetics, tuesday and 8 more...
Tweets
Looking for tweets for exonym.

mialuthien exonym – a name for a place that is not used within that place by the local inhabitants (neither in the official language of the state nor in local languages), or a name for a people or language that is not used by the people or language to which it refers Jul 18, 2008