Ἰώλκιος

From LSJ

ὅτι τίς ὁ ἄνθρωπος, ὃς ἐπελεύσεται ὀπίσω τῆς βουλῆς τὰ ὅσα ἐποίησεν αὐτήν; (Ecclesiastes 2:12, LXX version) → for who is the man who, after following his own plan, will find wisdom (in) everything he has done?

Source

Russian (Dvoretsky)

Ἰώλκιος: иолкский (γῆ, χθών Eur.).