My servant's. See note on Isaiah 37:5.
surnamed. Cyrus was the additional name divinely given. His Persian name is said to have been Agradates.
though thou hast not. when thou didst not.
Related Commentaries of Isaiah 45:4
Isaiah 45:4
4 For Jacob my servant's sake, and Israel mine elect, I have even called thee by thy name: I have surnamed thee, though thou hast not known me.