As it is written in the book of the words of Isaiah the prophet, "The voice of one crying in the wilderness, 'Make ready the way of the Lord. Make his paths straight.
And the word "tetrarch" means a ruler of a fourth part. And when Herod the Great died, he left the ruling of that area, they divided it into four, and three of his sons ruled over a part of the area. So a tetrarch was a ruler of a fourth part, and Philip the tetrarch of Iturea, Herod the tetrarch of Galilee,