Thayer's Greek Lexicon
προγινώσκω;
2 aorist 3 person singular προέγνω;
perfect passive participle προεγνωσμενος;
to have knowledge of beforehand;
to foreknow: namely, ταῦτα, 2 Peter 3:17, cf. 2 Peter 3:14, 16;
τινα, Acts 26:5; οὕς προέγνω, whom he (God) foreknew, namely, that they would love him, or (with reference to what follows) whom he foreknew to be fit to be conformed to the likeness of his Son, Romans 8:29 (τῶν εἰς αὐτόν (Χριστόν) πιστεύειν προεγνωσμενων, Justin Martyr, dialog contr Trypho, c. 42;
προγινώσκει (ὁ Θεός) τινας ἐκ μετανοίας σωθήσεσθαι μέλλοντας, id. Apology 1:28);
ὅν προέγνω, whose character he clearly saw beforehand, Rom. 11: (1 Lachmann in brackets), Romans 11:2 (against those who in the preceding passages from Rom. explain προγινώσκειν as meaning to predestinate, cf. Meyer, Philippi, Van Hengel);
προεγνωσμένου, namely, ὑπό τοῦ Θεοῦ (foreknown by God, although not yet 'made manifest' to men), 1 Peter 1:20.
(Wis. 6:14 Wis. 8:8 Wis. 18:6; Euripides, Xenophon, Plato, Herodian, Philostr., others.)