Now in the fifteenth year of the reign of Tiberius Caesar, Pontius Pilate being governor of Judea, and Herod being tetrarch of Galilee, and his brother Philip tetrarch of the region of Ituraea and Trachonitis, and Lysanias tetrarch of Abilene,
Since Luke is writing the history of Jesus, and not that of John, this wealth of chronological data must refer primarily to Jesus, and only incidentally to the Baptist. - Caspari, p. 41 [See Caspari p. 42 for greater details of the reign of each of these.]