Charles Ellicott Commentary Judges 13:18

"And the angel of Jehovah said unto him, Wherefore askest thou after my name, seeing it is wonderful?" — Judges 13:18 (ASV)

Seeing it is secret: The word is peli, which in Isaiah 9:5 is rendered “wonderful.” The word is an adjective, not the actual name of the angel. The only angel who names himself in Scripture is Gabriel.