Where does “Aethia” come from?

Aethia (Translingual) comes from Ancient Greek αἴθυια, from Ancient Greek αἴθω, from Proto-Hellenic *áitʰō.

Ancestry of “Aethia”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	αἴθυια	a diving bird, perhaps the shearwater
2	Ancient Greek	αἴθω	To ignite, kindle, light; To burn, blaze
3	Proto-Hellenic	*áitʰō	—