John Chrysostom
Catena Aurea · Markusevangelium 14
And Judas Iscariot, one of the twelve, went unto the Chief Priests, to betray him unto them. And when they heard it, they were glad, and promised to give him money. And he sought how he might conveniently betray him.
(de Prod. Jud. Hom. 1) Why dost thou tell me of his country? would that I could also have been ignorant of his existence. But there was another disciple called Judas the zealot, the brother of James, and lest by calling him by this name there should arise a confusion between the two, he separates the one from the other. But he says not Judas the traitor, that he may teach us to be guiltless of detraction, and to avoid accusing others. In that however he says, one of the twelve, he enhanced the detestable guilt of the traitor; for there were seventy other disciples, these however were not so intimate with Him, nor admitted to such familiar intercourse. But these twelve were approved by Him, these were the regal band, out of which the wicked traitor came forth.