Where does “Ἰόλαος” come from?

Ἰόλαος (Ancient Greek) comes from Ancient Greek ϝιόλᾱος.

Ancestry of “Ἰόλαος”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ϝιόλᾱος	—

Ἰόλαος — Etymology, Origin & Word History | Etymology Explorer