The corpus record
ios4
one, same
Generated live from the audited corpus — every figure on this page is a database query, not prose from memory.
ἰός · ios — LSJ
one, commonest in fem. (v. εἷς): neut. ἰῷ κίον ἤματι Il. 6.422: masc. dat. ἰῷ, = ἐκείνῳ, Leg.Gort. 8.8; but, = ἑνί, ib. 7.23; acc., τόν γʼ ἰὸν ἐνιαυτόν the same year, IG 5(1).1390.126 (Andania, i B.C.); ἰός, = μόνος, acc. to Trypho ap. A.D. Pron. 56.4.
No etymology authority pointer is recorded for this lemma yet — an honest gap, not an omission. The etymological dictionaries (Beekes, Chantraine, Frisk) are matched incrementally.