ἴοι (ioi)
ἴοι is an Ancient Greek form of ἰός, meaning “arrow; poison”. It is the nominative plural masculine noun.
It can also be a form of Ἰώ, “Io — Io, maiden turned into a cow”.
Found 66 times in the Ancient Greek texts on Socratos.
Where it is used
Theocritus, Εἰδύλλια 17.28: τῷ καὶ ἐπεὶ δαίτηθεν ἴοι κεκορημένος ἤδη
Aeschylus, Persians 461: θώμιγγος ἰοὶ προσπίτνοντές ὤλλυσαν·
Aeschylus, Prometheus Bound 635: σὸν ἔργον, Ἰοῖ, ταῖσδʼ ὑπουργῆσαι χάριν,
All forms of ἰός (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.