[Petronski]

Gal 2:9 James, and Cephas, and John. No proof of any greater authority can be drawn from the placing or numbering of James first, which perhaps St. Paul might do, because of the great respect he knew the Jewish converts had for St. James, bishop of Jerusalem, where the ceremonies of the law of Moses were still observed. Several Greek copies have Peter, James, and John. So we also read in St. Jerome's Commentary, p. 240, and St. John Chrysostom in his Exposition, p. 729, has Cephas, John, and James. (Witham)

[guitarplayer1953]

You use the same argument for Peter when he is mentioned first so what is it? Can't have it both ways.

[Petronski]

From Haydock’s Commentaries.