Where does “Aetnae” come from?

Aetnae (Latin) comes from Latin Aetna, from Ancient Greek αἴθω, from Proto-Hellenic *áitʰō.

Ancestry of “Aetnae”, step by step

Step	Language	Word	Meaning
1	Latin	Aetna	—
2	Ancient Greek	αἴθω	To ignite, kindle, light; To burn, blaze
3	Proto-Hellenic	*áitʰō	—

Aetnae — Etymology, Origin & Word History | Etymology Explorer