[arthurus]

The best argument that I have seen that it might not be John posits Lazarus as the writer of that Gospel. Lazarus is the one who is named as one whom Jesus loved and was surely a disciple. Remember, there were more than 12 disciples. The 12 were Apostles, not the same thing.Of the other three Gospels, only Matthew was written by an Apostle.

[RightWhale]

The John as author of ‘John’ might have been the John mentioned in Luke. Otherwise, it would not be something knowable at this late date.