Concise Bible Dictionary:
Son of Herod the Great by Malthace a Samaritan. He succeeded his father in the tetrarchy of Galilee and Perma. This was he whom the Lord called “that fox.” He heard John the Baptist “gladly,” yet put him to death. He was present at Jerusalem when the Lord was before Pilate, and by the courtesy of Pilate they settled their difference; but he treated the Lord with brutal indignity. He had married a daughter of Aretas king of Arabia, but subsequently induced Herodias the wife of Philip, his own half-brother, to leave her husband and live with him. This led to the death of John the Baptist by her desire, as recorded in scripture; and also to his being attacked and defeated with great loss by Aretas. Prompted by Herodias, he sought from the emperor Caligula the title of king (which did not belong to him though so called in Mark 6:14), but this ambition led to his perpetual banishment, A.D. 39. Herodias voluntarily accompanied him.