Augustine of Hippo — as excerpted in the Catena Aurea on Luke 6:12-16

“(de Con. Ev. lib. ii. c. 30.) With respect to the name of Judas the brother of James, Luke seems to differ from Matthew, who calls him Thaddæus. But what prevented a man from being called by two or three names? Judas the traitor is chosen, not unwittingly but knowingly, for Christ had indeed taken to Himself the weakness of man, and therefore refused not even this share of human infirmity. He was willing to be betrayed by His own Apostle, that thou when betrayed by thy friend mayest bear calmly thy mistaken judgment, thy kindness thrown away.”