From the same as homologeo; acknowledgment -- con- (pro-)fession, professed.
see GREEK homologeo
a. subjectively: ἀρχιερέα τῆς ὁμολογίας ἡμῶν, i. e. whom we profess (to be ours), Hebrews 3:1 (but others refer this to b.).
b. objectively, profession (confession) i. e. what one professes (confesses): Hebrews 4:14; 1 Timothy 6:12 (see ὁμολογέω, 3); 13 (see μαρτυρέω, a. p. 391a); τῆς ἐλπίδος, the substance of our profession, which we embrace with hope, Hebrews 10:23; εἰς τό εὐαγγέλιον τοῦ Χριστοῦ, relative to the gospel, 2 Corinthians 9:13 (translate, for the obedience ye render to what ye profess concerning the gospel; cf. ἡ εἰς τόν τοῦ Θεοῦ Χριστόν ὁμολογία, Justin Martyr, dialog contra Trypho,
c. 47 — a construction occasioned perhaps by ἡ εἰς τόν Χριστόν πίστις, Colossians 2:5; (cf. Winers Grammar, 381 (357))). ((Herodotus, Plato, others.))