Here "name" is a metonym for the person. Alternate translation: "liars who tell you that they are speaking my words to you" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here "hand" is a metonym for the power that the hand exercises. Alternate translation: "I will allow Nebuchadnezzar king of Babylon to conquer them" (See: [[rc://en/ta/man/translate/figs-metonymy]])