Where does “exonymous” come from?

exonymous (English) comes from English ous, from English ou, from Afrikaans ou, from Dutch oud, from Middle Dutch out, from Old Dutch ald, from Proto-West Germanic ald, from Proto-Germanic aldaz — to grow, nourish.

Ancestry of “exonymous”, step by step

exonymous traces back through two separate lines of ancestry.

via English ous

StepLanguageWordMeaning
1Englishousplural of ou
2EnglishouA probably extinct species of Hawaiian...
3AfrikaansouAn old fellow, guy, bloke; attributive form of...
4Dutchoudold
5Middle Dutchoutold
6Old Dutchald
7Proto-West Germanicaldold
8Proto-Germanicaldazold, grown up
9Proto-Indo-Europeanh₂eltós
10Proto-Indo-Europeanh₂él-to grow, nourish

via English exonym

StepLanguageWordMeaning
1EnglishexonymAn external name for a place, people or language...
2Englishexo-outside; external
3Ancient Greekἔξωout, out of; outside; without, except
4Ancient Greekσφαῖραball, globe, sphere
5Ancient Greek-ειδήςlike, connected to, from the nature of, full of;...
6Ancient Greek-ήςadjective suffix
7Proto-Indo-European-ēsPrimarily forms adjectival bahuvrīhi compounds
8Proto-Indo-European-ess
9Proto-Indo-European-osCreates action nouns or result nouns from verbs;...
Every word from Proto-Indo-European h₂él-Every word from Proto-Indo-European h₂eltósEvery word from Proto-Germanic aldaz
exonymous — Etymology, Origin & Word History | Etymology Explorer