LSJ
οἱ, = Lat. decemprimi, the chief municipal authorities of a city, γνώμη στρατηγῶν καὶ δεκαπρώτων IG 12(7).395.4 (Amorgos), etc. ; sg., ib. 239.12, Rev.Phil. 37.311 (Thyatira), POxy. 1204.4 (iii AD); fem. δεκαπρώτη, ἡ, PFlor. 76.11 (iii AD). = Lat. decemviri, Lyd. Mag. 1.34tit.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
οἱ, die zehn ersten Ratsherren, Inscr. 2264.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)