Magistrate attested in Apollonia Pontica in 425-339 BC. See F. M. Fraser / E. Matthews, A Lexicon of Greek Personal Names.
Vol. IV Macedonia. Thrace. Northern Regions of the Black Sea (2005), p. 213 s. v. ΛΥΚΕΙΣ; W. Leschhorn, Lexikon der Aufschriften
auf griechischen Münzen II (2009) p. 650 s. v. (ΛΥΚΟΣ) 5/4 c. BC. ; E. Paunov, The tetradrachm coinage of Apollonia Pontica:
Iconography, issues and magistrates, in: D. Boteva (ed.), Ex Nummis Lux: Studies in Honour of Dimitar Draganov (2017), 59-87,
p. 67 n. 22, p. 71 issue 7 (ΛΥΚΟΣ).