Mark 3:19

“And Judas Iscariot, etc..] So called to distinguish him from the other Judas; and is mentioned last for the following reason: which also betrayed him; and which action of his will ever render his name infamous among men. This man, with the rest, our Lord chose to be an apostle of his, though he knew he would betray him; in order to fulfil the purposes of God, the prophecies of the Old Testament, and bring on the work of man's redemption he came into the world to perform. And they went into an house at Capernaum; the house of Simon and Andrew, where Jesus used to be when there: they went home with him from the mountain; and from that time became his domestics, and were looked upon by him as…”

“For an account of the appointment of the apostles, see the notes at Matthew 10:1-4. And calleth unto him whom he would - Those whom he chose; whom he was about to appoint to the apostleship. See the notes at John 15:16. Mark 3:14 He ordained twelve - The word rendered “ordained” here does not express our notion of ordination to the ministry. It means, literally, “he made” - that is, he “appointed” twelve to be with him. Twelve - The reason why “twelve” were chosen was, probably, that such a number would be deemed competent witnesses of what they saw; that they could not be easily charged with being excited by sympathy, or being deluded, as a multitude might; and that, being destined to go…”

“3:19 Identifying Judas as Iscariot suggests that Mark wanted to avoid confusing him with another Judas (Luke 6:16; Acts 1:13). Iscariot probably comes from ’ish (“man of”) qeriyoth (“Kerioth,” a town in Judea). • who later betrayed him: See Mark 14:10-11, 43-46.”

“Judas: Mat 26:14-16, Mat 26:47, Mat 27:3-5; Joh 6:64, Joh 6:71, Joh 12:4-6, Joh 13:2, Joh 13:26-30; Act 1:16-25 into an house: or, home Mark 3:20”