Luke 6:16
Judas, the son of James [i.e., the same as Thaddaeus. See Matt. 10:3] and Judas Iscariot, who became a traitor [to Jesus].
John 14:22
[Then] Judas (not the betrayer) [Note: This was the son of James, See Luke 6:16. He is also called Thaddaeus, See Matt. 10:3], said to Jesus, "Lord, what has happened [i.e., to your original plans to be seen by everyone when you came. See Luke 21:27], that you will reveal yourself to us apostles [only] and not to the [whole] world?"
Matthew 10:3
Philip, Bartholomew [i.e., the same as Nathaniel. See John 1:45], Thomas [i.e., the same as Didymus. See John 11:16], Matthew, the tax collector [i.e., the same as Levi. See Mark 2:14], James, the son of Alphaeus, Thaddaeus [i.e., the same as Judas, son of James. See Luke 6:16],
Matthew 26:14-16
Then one of the twelve apostles, named Judas Iscariot, went to the leading priests
Matthew 27:3-5
Then Judas, who had betrayed Him [to the Jewish leaders], when he saw that Jesus had been condemned to die, changed his mind [i.e., about betraying Him] and brought back the thirty silver coins [Note: See Matt. 26:15 for the amount of money involved] to the leading priests and [Jewish] elders,
Mark 3:18
Andrew, Philip, Bartholomew [i.e., the same as Nathaniel. See John 1:45], Matthew [i.e., the same as Levi. See Mark 2:14], Thomas [i.e., the same as Didymus. See John 11:16], James, the son of Alphaeus, Thaddaeus [i.e., the same as Judas, the son of James. See Luke 6:16], Simon the Canaanean [i.e., the same as the Zealot. See Luke 6:15],
John 6:70-71
Jesus answered them, "Did I not choose [all] twelve of you, and one of you is a devil?" [Note: The word "devil" means "adversary" or "opponent"].
Acts 1:16-20
[He said], "Brothers, it was necessary that the Scriptures be fulfilled which the Holy Spirit spoke through King David about Judas, who guided the soldiers who came to arrest Jesus.
Acts 1:25
to replace Judas in this ministry and this group of apostles, from which he fell away to go to where he belonged" [i.e., to the place of punishment for unrepentant sinners].
Jude 1:1
[This is being written by] Jude, a slave of Jesus Christ, and a brother of James [Note: This "Jude" was probably not the apostle. See verses 17-18], to those who have been called [by God], who are also loved in [fellowship with] God the Father, and who are kept [safe] in [fellowship with] Jesus Christ.