τᾶν

indecl., ωταν
A. sir, my good friend, S. OT 1145, Ph. 1387, E. Ba. 802, Pl. Ap. 25c, Ep. 319e, D. 1.26: freq. in Com. (not in Ar.), Pl.Com. 17 D., Men. Sam. 202, Com.Adesp. 21.11 D.: with a pr. n., ὦ τ. Φαίδιμε ib.22.66 D.; used in addressing several persons, τί δρῶμεν, ὦ τᾶν; S. Ichn. 98; ἆρά γε, ὦ τᾶν, ἐθελήσετε; Cratin. 360, cf. Nicopho 29. (A.D. Adv. 159.11 says ωταν has a long final syllable and two accents: after criticizing earlier theories he derives it from ὦ Ἐτᾶν, in which Ἐτᾶν is a form of ἔτης, comparing μεγιστᾶν, ξυνᾶν: accented ὦ τᾶν in S. Ichn. l.c.)
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project