Abbott-Smith Manual Greek Lexicon
ἐπόπτης (G2030)
1 ** ἐπόπτης , -ου, ὁ [in LXX (of God): Es 5:1 , II Mac 3:39 7:35 , III Mac 2:21 * ;] an overseer (LXX, ll. c.). a spectator : II Pe 1:16 (of ἐ. as applied to God, v. parallels in Inscr., MM, Exp. , xiv; of the use of this term in the mysteries, v. Mayor on II Pe, l.c.; Thayer, s.v.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain