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. 192 s.v. ΚΛΕΙΝΙAΣ; W. Leschhorn, Lexikon der Aufschriften
auf griechischen Münzen II (2009) p. 612 s. v. ΚΛΕΙΝΙΟ, 4 c. BC; LGPN 4. p. 192; 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. 15a, p. 77 issue 33 (ΚΛΕΙΝΙAΣ)