'Apostles' in the Bible

Now the names of the twelve apostles are these; The first, Simon, who is called Peter, and Andrew his brother; James the son of Zebedee, and John his brother;

Then one of the twelve [disciples], who was called Judas Iscariot, went to the chief priests

As Jesus was still speaking, Judas [Iscariot], one of the twelve [disciples], came up accompanied by a large crowd with swords and clubs, [who came as representatives] from the chief priests and elders of the people.