Jerome. Lives of Illustrious Men 101
101 Victorinus the rhetorician PL 23, 701
Victorinus, an African by birth, taught rhetoric at Rome under the emperor Constantius and in extreme old age, yielding himself to faith in Christ wrote books against Arius, written in dialectic style and very obscure language, books which can only be understood by the learned. He also wrote Commentaries on the Epistles.
935 Victorinus, natione Afer, Romae sub Constantio principe rhetoricam docuit, et in extrema senectute, Christi se tradens fidei, scripsit adversus Arium libros more dialectico valde obscuros, qui nisi ab eruditis non intelliguntur, et Commentarios in Apostolum.
936 Βικτωρῖνος, γένει Ἄφρος, Κωνσταντίου βασιλεύοντος, ἐν τῇ Ῥώμῃ τὴν ῥητορικὴν διδάξας, ἐν τῷ ἐσχάτῳ γήρᾳ Χριστιανὸς γενόμενος, κατὰ Ἀρείου λόγους διαλεκτικοὺς πάνυ ἀμαυροὺς συνέγραψεν, οἵτινες παρὰ τῶν πεπαιδευμένων μόνον νοοῦνται, καὶ ὑπομνήματα εἰς τὸν Ἀπόστολον.