Etymology

-onymous

Today it means: Having a specified number or type of names. Full definition →

Proto-Indo-European *h₃édosder.? ← Ancient Greek ὄνυμα (ónuma)
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The story

  1. Ancient Greekὄνυμα (ónuma)
  2. Proto-Indo-European*h₃ed-
  3. Proto-Indo-European*h₃édosder.?
  4. English today-onymous

Adapted borrowing of Latin -ōnymos /-ōnymus + -ous, from Ancient Greek -ώνυμος (-ṓnumos), from ὄνυμα (ónuma, “name”) + -ος (-os, suffix forming compound adjectives). By surface analysis, -onym + -ous.

Etymology from Wiktionary, CC BY-SA 4.0.