John Gill

Then saith one of his disciples,.... Who had no true love for his master, was an hypocrite, and a covetous person: Judas Iscariot; so called, to distinguish him from another Judas, an apostle; See Gill on Mat 10:4. Simon's son; this is omitted in the Vulgate Latin, Syriac, Persic, and Ethiopic versions; See Gill on Joh 13:2; which should betray him; and so he did; this was pre-determined by God, foretold in prophecy, and foreknown by Christ; and is observed here, to show the temper and character of the man.