Iscariot = a man of Kerioth, which was in Judah (Jos_15:25). Kerioth now probably Khan Kureitin.
the son of Simon. So designated only here, Joh_12:4; Joh_12:13, Joh_12:2, Joh_12:26. The only apostle not a Galilean. Compare Joh_12:6.
that should betray Him = [who] was about to betray Him. Note the two verbs. Thus ends the second por tion of the Lord's ministry (App-119), and thus is ushered in the third.