John Trapp on Isaiah 52:6

Ver. 6. Therefore my people ſhall know my name] ſc. That I am Jehovah, as Exod. 6.3. the God of Amen, Iſa. 65.16. who will not ſuffer my faithfulneſs to faile, nor alter the thing that is gone out of my mouth, Pſal. 89.33, 34. And it ſhall therefore be ſo becauſe my name (that nomen majeſtativum) hath been blaſphemed and vilified: Gods people fare the better for their enemies inſolencies.

That I am he that doth ſpeak: behold it is I] Or, that it is I that do speak, ſaying, Loe here I am. This ſome underſtand of the ſecond perſon in Trinity, the eternal Son of the eternal Father, called the Word. Joh. 1.1. and there are that give us this Rule, Where the Old Teſtament bringeth in God appearing and ſpeaking, we are to underſtand it alway of the ſecond perſon. See Joh. 12.37, to 42.