Where does “Ἰτάνον” come from?

Ἰτάνον (Ancient Greek) comes from Ancient Greek Ἴτανος.

Ancestry of “Ἰτάνον”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	Ἴτανος	—

Ἰτάνον — Etymology, Origin & Word History | Etymology Explorer