From BiblePortal Wikipedia

Hastings' Dictionary of the New Testament [1]

(Ῥόδη ‘rose’)

After St. Peter’s miraculous deliverance from Herod’s prison he went to the house of Mary the mother of Mark. When he had knocked, a young girl called Rhoda came to listen. In her joy at the sound of St. Peter’s voice, she forgot to open the door, and, returning to report his presence, she was accused of being mad, but persisted in her declaration ( Acts 12:13-15). Nothing further is known of her. The name was a common slave name, and she may have been a Christian slave in the home where we find her.

Literature.-W. M. Ramsay, The Bearing of Recent Discovery on the Trustworthiness of the NT, London, 1915, p. 209 ff.; Lady Ramsay, ‘Her that kept the Door,’ Expository Timesxxvii. (1915-16) 217 ff., 314 ff.

W. F. Boyd

Smith's Bible Dictionary [2]

Rho'da. (Rose). The name of a maid, who announced Peter's arrival at the door of Mary's house, after his miraculous release from prison.  Acts 12:13. (A.D. 44).

Hastings' Dictionary of the Bible [3]

RHODA . The name of the maid-servant in the house of Mary, John Mark’s mother, when St. Peter came there on his release from prison by the angel (  Acts 12:13 ).

A. J. Maclean.

Hawker's Poor Man's Concordance And Dictionary [4]

A name ever-memorable from Peter's history, in the angel delivering him from prison. The name in the original means rose. ( Acts 12:13-14)

American Tract Society Bible Dictionary [5]

Rose, a young damsel in the household of Mary mother of John Mark, when Peter was miraculously released from prison,  Acts 12:13 .

Fausset's Bible Dictionary [6]

The maid who announced Peter's arrival at Mary's door after his release from prison ( Acts 12:13-14).

Morrish Bible Dictionary [7]

A maid in the house of Mary when Peter was delivered from prison.  Acts 12:13 .

Holman Bible Dictionary [8]

 Acts 12:13 Luke 24:9-11

Easton's Bible Dictionary [9]

 Acts 12:12-15

International Standard Bible Encyclopedia [10]

rō´da ( Ῥόδη , Rhódē , "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 (  Acts 12:12 ff).

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [11]

( ῾Ρόδη , Rose ) , the name of a servant-maid who announced Peter's arrival at the door of Mary's house after his miraculous release from prison ( Acts 12:13). A.D. 44. (See Porter).

Kitto's Popular Cyclopedia of Biblial Literature [12]

Rho´da (Rose), a servant maid mentioned in .