en_tn/jhn/11/49.md

a certain man among them

This is a way to introduce a new character to the story. If you have a way to do this in your language, you can use it here. (See: rc://en/ta/man/translate/writing-participants)

You know nothing

This is an exaggeration that Caiaphas uses to insult his hearers. AT: "You do not understand what is happening" or "You speak as though you know nothing" (See: rc://en/ta/man/translate/figs-hyperbole)