Gregory the Great

(Hom. 34, in Evan.) To the virgin Mary was sent, not any one of the angels, but the archangel Gabriel; for upon this service it was meet that the highest angel should come, as being the bearer of the highest of all tidings. He is therefore marked by a particular name, to signify what was his effectual part in the work. For Gabriel is interpreted, “the strength of God.” By the strength of God then was He to be announced Who was coming as the God of strength, and mighty in battle, to put down the powers of the air.