Where does “topo-” come from?

topo- (Catalan) comes from Serbo-Croatian -onim, from Ancient Greek ὄνυμα, from Ancient Greek ὄνομα, from Proto-Indo-European h₁nómn̥, from Proto-Indo-European h₃neh₃- — to name.

Ancestry of “topo-”, step by step

Step	Language	Word	Meaning
1	Serbo-Croatian	-onim	—
2	Ancient Greek	ὄνυμα	Doric and Aeolic form of ὄνομᾰ
3	Ancient Greek	ὄνομα	name; fame; noun, in the wide sense: referring to...
4	Proto-Indo-European	h₁nómn̥	name
5	Proto-Indo-European	h₃neh₃-	to name

Words derived from “topo-”

toponímia

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