Magistrate attested in Apollonia Pontica in the last quarter of the 5th and the 4th c. BC. See 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. 16b, p. 69 issue 2 (ΚΛΕΙΝΙΟ)