And after certain days king Agrippa and Bernice came unto Caesarea to salute Festus. King Agrippa - This was the son of Herod Agrippa, who is mentioned Acts 12:1. Upon the death of his father's youngest brother, Herod, he succeeded him in the kingdom of Chalcis, by the favor of the Emperor Claudius: Jos. Antiq. lib. xx. cap. 4, s. 2; and Bell. lib. ii. cap. 12, s. 1. Afterwards, Claudius removed him from that kingdom to a larger one, giving him the tetrarchy of Philip, which contained Trachonitis, Batanea, and Gaulonitis. He gave him, likewise, the tetrarchy of Lysanias, and the province which Varus had governed. Jos. Antiq. lib. xx. cap. 6, s. 1; Bell. lib. ii. cap. 19, s. 8. Nero made a farther addition, and gave him four cities, Abila, Julias in Peraea, Tarichaea and Tiberias in Galilee: Jos. Antiq. lib. xx. cap. 7, s. 4; Bell. lib. ii. cap 13, s. 2. Claudius gave him the power of appointing the high priest among the Jews; Joseph. Antiq. lib. xx. cap. 1, s. 3; and instances of his exercising this power may be seen in Joseph. Antiq. lib. xx. cap. 7, s. 8, 11. This king was strongly attached to the Romans, and did every thing in his power to prevent the Jews from rebelling against them; and, when he could not prevail, he united his troops to those of Titus, and assisted in the siege of Jerusalem: he survived the ruin of his country several years. See Bishop Pearce and Calmet.
Bernice, or, as she is sometimes called, Berenice, was sister of this Agrippa, and of the Drusilla mentioned Acts 24:24 : She was at first married to her uncle Herod, king of Chalcis, Jos. Antiq. lib. xix. cap. 9, s. 1; and, on his death, went to live with her brother Agrippa, with whom she was violently suspected to lead an incestuous life. Juvenal, as usual, mentions this in the broadest manner - Sat. vi. ver. 155: -
Deinde adamas notissimus, et Berenices
In digito factus pretiosior: hunc dedit olim
Barbarus incestae, dedit hunc Agrippa sorori.
"Next, a most valuable diamond, rendered more precious by being put on the finger of Berenice; a barbarian gave it to this incestuous woman formerly; and Agrippa gave this to his sister."
Josephus mentions the report of her having criminal conversation with her brother Agrippa, φημης επισχουσης, ὁτι τἀδελφῳ συνῃει. To shield herself from this scandal, she persuaded Polemo, king of Cilicia, to embrace the Jewish religion, and marry her; this he was induced to do on account of her great riches; but she soon left him, and he revolted to heathenism: see Jos. Antiq. lib. xx. cap. 7, s. 3. After this, she lived often with her brother, and her life was by no means creditable; she had, however, address to ingratiate herself with Titus Vespasian, and there were even rumors of her becoming empress - propterque insignem reginae Berenices amorem, cui etiam nuptias pollicitus ferebatur. - Suet. in Vit. Titi. Which was prevented by the murmurs of the Roman people: Berenicen statim ab urbe dimisit, invitus invitam. - Ibid. Tacitus also, Hist. lib. ii. cap. 1, speaks of her love intrigue with Titus. From all accounts she must have been a woman of great address; and, upon the whole, an exceptionable character.