ἰήϊος, α, ον, also ος, ον (v. infr. 11), epith. of Apollo, the god
invoked with the cry ἰή or ἰὴ παιών (v. ἰή), ἰήϊε παιάν Pi.Pae.2.35, cf. A.Ag.146, S.OT154 (both lyr.), 1096, Ar.V.874, A.R.2.702, Duris 79J. II.
mournful, grievous, ἰήϊοι κάματοι S.OT174 (lyr.); ἰήϊος βοά, γόος, a cry
of mourning, E.Ph.1036, El.1211 (both lyr.). (From the cry ἰή, as Εὔιος from εὐοἵ; but also associated with ἰάομαι, Hsch. (hence applied to Asclepius, IG3.171); and, as ἱήϊος, with ἵημι, Hsch., Macr.Sat.1.17.16.)