Etymology

deonym

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Today it means: A term which derives from a proper name (proper noun), such as brand name (genericized trademark), a given name or surname (eponym), or a place name (toponym). Full definition →

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deonym · noun1

From de- + -onym (“name”). Compare Italian deonomastica (“words of a language that are derived from given names, last names, ethnonyms, and toponyms”), from de- + onomastica.

deonym · noun2

From Latin deus (“god”) + -onym.

Etymology from Wiktionary, CC BY-SA 4.0.