LSJ
ὁ, (< τέλος) title of a magistrate of the Achaean League, Plb. 16.36.4; in pl., Id. 10.23.9; ἀ. τῶν πεζῶν subordinate commander, IG 5(2).293 (Mantinea).
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
(s. τέλος, οἱ ἐν τέλει), οἱ ἀποτέλειοι Magistrate in den achäischen Städten, Pol. 10.21, 16.36.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)