ἠρῐ-γένεια · ēri-geneia — LSJ
early-born, child of morn, morn, morning
early-born, child of morn, epith. of Ἠώς, Od. 4.195, etc.: also abs., = Ἠώς, 22.197, 23.347; καθαρᾶς ἅπερ ἠριγενείας as at clear morn, Theoc. 24.39; γενέθλιον ἠριγένειαν a birthday morning, AP 9.353 (Leon.Alex.); later, epith. of the Moon, Hymn.Mag. 5.3.
2 a day
in later Ep., a day, Nonn. D. 38.271, Q.S. 10.478.
II bearing in spring
(ἔαρ) bearing in spring, λέαινα A. Fr. 426 (nisi leg. ἠυγ-).