The Early Fathers on John 1:3-4

The evidence from the pre-Nicenes suggests that they took the expression hO GEGONEN in Jn 1:3-4 with what follows rather than with what precedes. For example, Clement of Alexandria evidently writes:

Ver. 2. "The life was manifested." For in the Gospel he thus speaks: "And what was made, in Him was life, and the life was the light of men."

See his Comments on the Epistle of John in Fragments of Clemens Alexandrinus.

Also see Contra Celsum 6.5 by Origen of Alexandria