King James Version
He spake of Judas Iscariot the son of Simon: for he it was that should betray him, being one of the twelve.New International Version
(He meant Judas, the son of Simon Iscariot, who, though one of the Twelve, was later to betray him.)Catholic Public Domain Version
Now he was speaking about Judas Iscariot, the son of Simon. For this one, even though he was one of the twelve, was about to betray him