Magistrate attested in Apollonia Pontica in c. 425-306 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. 133 s.v. ΕΥΚΥΔΗΣ; W. Leschhorn, Lexikon der Aufschriften
auf griechischen Münzen II (2009) p. 505 s.v. ΕΥΚΥΔΗΣ, 3/2 c. BC, p. 702 s. v. ΝΑΥΚΥΔΗΣ?, 3/2 c. BC, perhaps wrong; it could
be rather ΕΥΚΥΔΗΣ.