ὅνυ
From LSJ
Τοὺς δούλους ἔταξεν ὡρισμένου νομίσματος ὁμιλεῖν ταῖς θεραπαινίσιν → He arranged for his male slaves to have sex with female slaves at a fixed price (Plutarch, Life of Cato the Elder 21.2)
English (LSJ)
Arc. and Cypr. for ὅδε, declined like ὁ with addition of -νυ, nom. sg. masc. ὅνυ Inscr.Cypr.141 H., acc. τόνυ ib.140H., dat. τῷνυ Schwyzer664.11 (Orchom. Arc., iv B. C.), acc. pl. neut. τάνυ IG5(2).3.14 (Tegea, iv B. C.), gen. τῶννυ SIG306.59 (ibid., iv B. C.), IG5(2).262.23 (Mantinea, v B. C.), dat. pl. fem. ταῖννυ SIG306.30; also, with -νυν for -νυ, acc. sg. fem. τάννυν, acc. pl. masc. τόσνυν, ib.559.48,49 (Megalopolis, found at Magn. Mae., iii B. C.).