ἑοῦ

A. = ἕο, read by Zenod. in Il. 2.239, cf. A.R. 4.803. ἑοῦς. Boeot. for ἕο, οὗ, gen. of pers. Pron. 3 pers., Corinn. 2. ἐοῦσα, Ion. and Ep. for οὖσα, pres. part. fem. of εἰμί.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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