Thomas Coke Commentary on the Holy Bible - John 18:15
John 18:15. And so did another disciple:— This, as we have before observed, is supposed to have been St. John himself. See on Mat 26:69 and Luke 22:54. Grotius however is of opinion, that this disciple was not one of the twelve, but rather an inhabitant of Jerusalem; possibly the person at whose house our Lord ate the paschal supper. Whitby likewise thinks it was not John. These authors found their opinion on this circumstance, that the twelve being Galileans, and men of mean stations, could... read more
Coffman Commentaries on the Bible - John 18:17
The maid therefore that kept the door saith unto Peter, Art thou also one of this man's disciples? He saith, I am not. Now the servants and the officers were standing there, having made a fire of coals; for it was cold; and they were warming themselves: and Peter also was with them, standing and warming himself.Art thou also ... indicates that John was openly known as a disciple of Jesus, and there is no evidence that Peter would have suffered any inconvenience by an open admission of his... read more