Where does “Epirus” come from?

Epirus derives from Latin Epirus, from Ancient Greek Ἤπειρος, from the same root as Ancient Greek ἤπειρος, ultimately from Proto-Indo-European Heh₂per-.

Ancestry of “Epirus”, step by step

Step	Language	Word	Meaning
1	Latin	Ēpīrus	—
2	Ancient Greek	Ἤπειρος	Epirus; mainland
3	Proto-Hellenic	ā́peřřos	—
4	Proto-Indo-European	Heh₂per-	—

Every word from Proto-Indo-European Heh₂per- →

Epirus — Etymology, Origin & Word History | Etymology Explorer