Who is Jethro?
(His excellence), a priest or prince of Midian, and father-in-law of Moses. Ex 3:1. He is called Raguel, Num 10:29, and Reuel, Ex 2:18, and was probably known by either name, while Jethro was his official title. It is highly probable, too, that he was a descendant of Abraham by Keturah, the mother of Midian, Gen 25:2, but what was the nature of his office as priest (or prince, as some say it should be rendered) we know not. See Hobab.