“The priest of Midian,” Moses’ father-in-law (Ex. 2:18)=Raguel (Num. 10:29). If he be identified with Jethro (q.v.), then this may be regarded as his proper name, and Jether or Jethro (i.e., “excellency”) as his official title.
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition