ro'-da (Rhode, "rose"): A maid in the house of Mary the mother of John Mark. She came to answer when Peter knocked at Mary's door after his miraculous release from prison. On recognizing his voice, she so forgot herself with joy that she neglected to open the door, but ran in to tell the others the glad news. They would not believe her, thinking she was mad; and when she persisted in her statement they said it must be his angel. The Jewish belief was that each man had a guardian angel assigned to him. Peter continued knocking, and was ultimately admitted (Ac 12:12 ff).
S. F. Hunter