The Greek proper noun Agrippas (Ἁγρίππας) is the name of Herod Agrippa II (c. 27–92 AD), great-grandson of Herod the Great, who appears in Acts 25-26. Paul was brought before Agrippa and his sister Bernice at Caesarea, where he delivered one of his most powerful speeches — his personal testimony and defense of the resurrection.
Paul's audience with Agrippa (Acts 26) is one of the great apologetic moments of the New Testament. When Festus the Roman governor called Paul's learning madness, Paul appealed directly to Agrippa's knowledge of Jewish scriptures and prophecy: "King Agrippa, do you believe the prophets? I know you believe" (Acts 26:27). Agrippa's response — "Do you think that in such a short time you can persuade me to be a Christian?" (v. 28) — is one of Scripture's most poignant near-conversions. The man who held authority over Paul was himself one question away from the kingdom. The episode teaches that proximity to truth is not the same as submission to it. Paul, the prisoner, was freer than the king.