Mark 3:13-19
13 He went up on the hillside and called those whom He Himself wanted and chose; and they came to Him. 14 And He appointed twelve [disciples], so that they would be with Him [for instruction] and so that He could send them out to preach [the gospel as apostles—that is, as His special messengers, personally chosen representatives], 15 and to have authority and power to cast out demons.
16 He appointed the twelve: Simon (to whom He gave the name Peter), 17 and James, the son of Zebedee, and John the brother of James (to them He gave the name Boanerges, that is, “Sons of Thunder”); 18 and [He also appointed] Andrew, and Philip, and Bartholomew (Nathanael), and Matthew (Levi the tax collector), and Thomas, and James the son of Alphaeus, and Thaddaeus (Judas the son of James), and Simon the Zealot; 19 and Judas Iscariot, who betrayed Him.
Luke 6:12-16
12 Now at this time Jesus went off to the mountain to pray, and He spent the whole night in prayer to God. 13 When day came, He called His disciples and selected twelve of them, whom He also named apostles (special messengers, personally chosen representatives):
14 Simon, whom He also named Peter, and his brother Andrew; and [the brothers] James and John; and Philip, and Bartholomew [also called Nathanael]; 15 and Matthew (Levi, the tax collector) and Thomas; and James the son of Alphaeus, and Simon who was called the Zealot; 16 Judas [also called Thaddaeus] the son of James, and Judas Iscariot, who became a traitor [to the Lord].