Where does “ὁμώνυμον” come from?

ὁμώνυμον (Ancient Greek) comes from Ancient Greek ὄνομα, from Proto-Indo-European h₁nómn̥, from Proto-Indo-European h₃neh₃- — to name.

Ancestry of “ὁμώνυμον”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὄνομα	name; fame; noun, in the wide sense: referring to...
2	Proto-Indo-European	h₁nómn̥	name
3	Proto-Indo-European	h₃neh₃-	to name