Nicene and Post-Nicene Fathers, Ser. II, Vol. III: Jerome...
p. 381 Chapter CI.
Victorinus, 2528 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.
Caius or Fabius Marius Victorinus, died about 370.