Judah, Israel, and Jerusalem. With 'eth pre- fixed to the first two (not Jerusalem) for emphasis, so that we may not confuse them with the Church or with Gentile peoples. There is no "gloss", as alleged.
Related Commentaries of Zechariah 1:19
Zechariah 1:19
19 And I said unto the angel that talked with me, What be these? And he answered me, These are the horns which have scattered Judah, Israel, and Jerusalem.