Magistrate attested in Apollonia Pontica. See F. M. Fraser / E. Matthews, A Lexicon of Greek Personal Names. Vol. IV Macedonia.
Thrace. Northern Regions of the Black Sea (2005), p. 116 s.v. ΕΚΑΤΑΙΟΣ; W. Leschhorn, Lexikon der Aufschriften auf griechischen
Münzen II (2009) p. 473 s. v. ΕΚΑΤΑΙΟΣ, 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. 9, p. 70
issue 6 (ΕΚΑΤΑΙΟΣ I), p. 74 issue 18 (ΕΚΑΤΑΙΟΣ II).