Where does “Ēpīrus” come from?

Ēpīrus (Latin) comes from Ancient Greek Ἤπειρος, from Proto-Hellenic ā́peřřos, from Proto-Indo-European Heh₂per-.

Ancestry of “Ēpīrus”, step by step

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

Ēpīrus — Etymology, Origin & Word History | Etymology Explorer