Magistrate attested in Apollonia Pontica in the 4th c. BC. See D. Draganov - E. Paunov, An Unpublished Hoard of Apollonia
Pontica and Mesembria Diobols from Dobrudja. RCAN III, 2017 3 (2017), 306–16, p.310, no. 3, ca. 375-342/1 BC; F. M. Fraser
/ E. Matthews, A Lexicon of Greek Personal Names. Vol. IV Macedonia. Thrace. Northern Regions of the Black Sea (2005), p.
80 s. v. ΓΛΑUKIAΣ? 4 c BC (LGPN V4-4038); W. Leschhorn, Lexikon der Aufschriften auf griechischen Münzen II (2009) p. 418
s. v. ΓΛΑΥ(KIAΣ), 350-300 BC.