“And the Angel of the Lord said vnto him, Why askest thou thus after my name, seeing it is secret?”
1611 King James Version (KJV)
13:18 Secret - Hidden from mortal men: or, wonderful, such as thou canst not comprehend: my nature and essence, (which is often signified by name in scripture) is incomprehensible. This shews, that this was the angel of the covenant, the Son of God.