In Greek mythology, Neonus (The name is derived from the ancient root word neos (νέος).) was a Phthian prince as the son of King Hellen of Thessaly, the son of Deucalion, the Hellenic progenitor. His mother was possibly the nymph Orseis (OthreisWest 1985, p. 57.), and thus he was probably the brother to Aeolus, Dorus, Xuthus and Xenopatra.Fowler 2013, p. 142; Scholia on Plato's Symposium 208d (Cufalo, pp. 108–10) [= FGrHist 4 F125 = Hellanicus fr. 125 Fowler, pp. 200–1 = FGrHist 323a F23]. Neonus was the father of Dotus, eponym of Dotium in Thessaly.Stephanus of Byzantium, s.v. Dotion (pp. 118, 119) [= FGrHist 604 F3].
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References Stephanus of Byzantium, Stephani Byzantii Ethnica: Volumen II Delta - Iota, edited by Margarethe Billerbeck and Christian Zubler, De Gruyter, 2011. . Online version at De Gruyter. Internet Archive. Google Books.