LSJ
(sic), ον, is expld. by ἰοῖς ὅμοιον τὸ ἐπικράνισμα, Hsch. ; ὁ στέμμα ἐξ ἴων φορῶν, Suid. (Prob. compds. of a dialectic form of ἑανός, wh. (viz. ἑανός) is glossed μαλακός, λεπτός, λαμπρός in Sch. Il. 18.613.)
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)