Greek Expositor (anonymous) — as excerpted in the Catena Aurea on Luke 2:8-12

“(Geometer.) They were alarmed at the miracle, as it follows, And they were afraid, &c. But the Angel dispels their rising fears. He not only soothes their terrors, but pours gladness into their hearts; for it follows, For, behold, I bring you good tidings of great joy, &c. not to the Jewish people only, but to all. The cause of their joy is declared; the new and wonderful birth is made manifest by the very names. It follows, For unto you is born this day in the city of David a Saviour, which is Christ the Lord. The first of these, i. e. the Saviour, has reference to the action, the third, i. e. the Lord, to the dignity of the person.”