Interjection ō (O!) in the Gospels-Acts

(Translation from NRSV with a few modifications for a more literal meaning)

Matthew

15: 28Then Jesus answered her, "O (ō) Woman, great is your faith! Let it be done for you as you wish." And her daughter was healed instantly.
17: 17Jesus answered, "O (ō) generation faithless and perverse how much longer must I be with you? How much longer must I put up with you? Bring him here to me."

Mark

9: 19He answered them, "O (ō) Generation faithless, how much longer must I be among you? How much longer must I put up with you? Bring him to me."

Luke

9: 41Jesus answered, "O (ō) generation faithless and perverse, how much longer must I be with you and bear with you? Bring your son here."
24: 25Then he said to them, "O (ō) heart foolish and slow to believe all that the prophets have declared!

Acts

1: 1In the first book, o (ō) Theophilus, I wrote about all that Jesus did and taught from the beginning
13: 10and said, "O (ō) son of the devil, you enemy of all righteousness, full of all deceit and villainy, will you not stop making crooked the straight paths of the Lord?
18: 14And when Paul was now about to open his mouth, Gallio said unto the Jews, If it were a matter of wrong or wicked lewdness, O (ō) you Jews, reason would that I should bear with you:
27: 21Since they had been without food for a long time, Paul then stood up among them and said, "O (ō) men, you should have listened to me and not have set sail from Crete and thereby avoided this damage and loss.