Υυ,τό,indecl., twenty-third letter of the Formello abecedarium, IG 14.2420 , but twentieth of the Ion. alphabet: as numberalύ =
400 , butυͅ =
400 , 000 . It is calledτὸ ὖby Pl. Cra. 393d , Callias ap. Ath. 10.453d (prob., the line endsταῦ, <τὸ> ὖ), IG 22.2783.4
(iv B. C.), Hellad. ap. Phot. Bibl. p.530
B. ;τό τ' ὖorτό θ' ὗmight be read in Achae. 33.3 forτοῦ ῡcodd. Ath. ; laterτὸ υ ψιλόνorτὸ ψιλὸν υ(as name of the first letter ofὕαλος, υἱός,etc.), Theognost. Can. 18 , Sch. Ar. Pl. 896 , Ps. Hdn. Epim. 116 , 137 , al.: so named to distinguish it fromἡ ο̄ῑ δίφθογγος, υandοιbeing pronounced alike in late Gr.;ὗis aspirated in AP 9.385.20 (Steph.Gramm.), 11.67.1 ( Myrin. ) cod.Pal.; the Coptic name
A. he(cf. Arm.hiun) may indicate that the early name wasὗ,which seems also to be implied by Serv.ad Verg. A. 1.744 :alii dicunt Hyadas dictas vel ab Y littera, vel ἀπὸ τοῦ ὑός,cf. Sch. Il. 18.486 : the sign Y representshyon coins of P. Plautius Hypsaeus ( 58 B.C.), which are inscribedYpsae, BMus.Cat.Republ.Coins, Plate
48 Nos. 2 , 3 , 4 , 5 , butHupsae,Nos. 13 , 14 , Plate 123 Nos. 7 , 8 , 9 .