Fausset's Bible Dictionary 
Berenice or Bernice Oldest daughter of Herod Agrippa I ( Acts 12:1). Married to her uncle Herod, king of Chalcis. Suspected after his death of intimacy with her own brother, Agrippa II, with whom she visited Festus, on his appointment as procurator of Judaea, and heard Paul's defense ( Acts 25:13; Acts 25:23; Acts 26:30). Next, she was married to Polemon, king of Cilicia; but left him for her brother. Subsequently, she was mistress of Vespasian, then of Titus, who, when emperor, cast her off.
Smith's Bible Dictionary 
Bereni'ce. See Bernice .
Morrish Bible Dictionary 
Cyclopedia of Biblical, Theological and Ecclesiastical Literature 
in Greek mythology, was the daughter of king Ptolemy Philadelphus of Egypt and of Arsinoe, who was married to her brother Ptolemy. When the latter went to Syria to war, Berenice, who loved him dearly, vowed her hair to Venus in the event of his safe return, and placed it in the temple of Aphrodite Zephyritis. On the following day it was missed, and the Samian astronomer Conon affirmed that it had been placed among the stars. There may be found by the name of "hair from the head' of Berenice" a group of stars near the tail of the Lion in the northern heavens, from 170 to 203 in a straight ascension. Its stars are all of or below the fourth magnitude, and many nebulous mists. Berenice herself was adored as an Egyptian goddess in the city of Memphis under Ptolemy V.