Where does “homonymical” come from?

homonymical (English) comes from English homonym, from Latin homōnymum, from Ancient Greek ὁμώνυμον, from Ancient Greek ὄνομα, from Proto-Indo-European h₁nómn̥, from Proto-Indo-European h₃neh₃- — to name.

Ancestry of “homonymical”, step by step

Step	Language	Word	Meaning
1	English	homonym	A word that both sounds and is spelled the same...
2	Latin	homōnymum	—
3	Ancient Greek	ὁμώνυμον	—
4	Ancient Greek	ὄνομα	name; fame; noun, in the wide sense: referring to...
5	Proto-Indo-European	h₁nómn̥	name
6	Proto-Indo-European	h₃neh₃-	to name

Every word from Proto-Indo-European h₃neh₃- →Every word from Proto-Indo-European h₁nómn̥ →Every word from Ancient Greek ὄνομα →