By Water & Blood

Panarion 51, Chapter 14: Andrew, Peter, Philip, and the unnamed disciple

After these things the beginning of the calling of those around Peter from Andrew is signaled. For Andrew, one of the two who had followed him, went up to him—being disciples under John, yet still remaining in Galilee and at times attending upon John.

And immediately, when Andrew stayed that day (it was about the tenth hour), it happened that on that very day he met his own brother Simon and said the things already mentioned—that we have found the Messiah—and brought him to the Lord, and what follows, as the sequence has it, that he said to him, “You shall be called Cephas.”

“And on the following day,” it says, “he wanted to go out into Galilee, and he finds Philip, and Jesus says to him, ‘Follow me.’ Now Philip was from Bethsaida, from the city of Andrew and Peter.”

And you see that this grants us to consider that of the two who followed, being disciples of John, he has named only one—that it was Andrew—and has not named the other;

so that we may consider that this one whose name he has not spoken, because of sharing the same place, the same dwelling, the same craft, the same work, is either John or James, one of the sons of Zebedee.

For these had to be called first, then Philip, according to the sequence as it is set in the Gospels: Peter first, then Andrew, then James, then John, after these Philip. But for now let speaking about these things be left aside; for the sequence of this narrative is long.