Luke 6:16

(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 Thaddaeus. 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.

Our Lord Jesus Christ, having spent the night in prayer, and having conversed with His Father and God in heaven in a way ineffable and beyond our powers of understanding, and such as is known solely to Himself—even therein making Himself an example unto us of that which is necessary for salvation; for He taught us in what way we too may rightly and blamelessly offer our prayers—comes down from the mountain, and appoints those who were to be the world's teachers, according to the words He spake, "Ye are the light of the world." And of this appointment of the holy Apostles, the blessed David also makes mention, addressing himself, as it were, to Christ: "Thou shalt make them rulers over all the earth; they shall make mention of Thy name in every successive generation." For verily, while they were in the body, they made mention of the glory of Christ, telling His mystery both in cities and villages: and now that they have been called to the mansions that are above, none the less do they still even thus converse with us about Him, by the most wise history which they have written concerning Him. And those, indeed, who were appointed priests according to the law of Moses, even Aaron and his company, were made beautiful to the senses by vestments suitable to their priestly dignity; but the divine disciples, being adorned with spiritual gifts, had entrusted to them the ministry of the Gospel oracles. For it was said unto them, "Heal the sick: cast out daemons: cleanse lepers: raise the dead." And being thus invested with Christ's power, they have filled the whole world with astonishment. But mark the extreme moderation of the Evangelist: for he does not simply say that the holy Apostles were appointed, but rather, by introducing the record of these chief ones each by name, takes care that no one should venture to enrol himself in the company of those that were chosen. […]

But mark the great carefulness of the Evangelist. He not only says that the holy Apostles were chosen, but he enumerates them by name, that no one should dare to insert any others in the catalogue; Simon, whom he also called Peter, and Andrew his brother. But if we may learn the interpretation of the Apostles' names, know that Peter means, "loosening or knowing;" Andrew, "glorious power," or "answering;" but James, "apostle of grief;" John, "the grace of the Lord;" Matthew, "given;" Philip, "large mouth," or the "orifice of a torch;" Bartholomew, "the son of him who lets down water;" Thomas, "deep or twin;" James the son of Alphæus, "supplanter of the step of life;" Judas, "confession;" Simon, "obedience."

Judas, whose name is interpreted as confessing, of James, so that he may be an example of vigor in action: Matthew 5: "Let your light shine before men, that they may see your good works and glorify your Father who is in heaven." Hence Tobit …

Judas of James, and Judas Iscariot, who was the traitor. And for the sake of distinction, he doubled the names. One of whom, as he himself writes in the catholic Epistle, is the brother of James, who was also called Thaddaeus. The other took his …