Meaning: friend of God
This was the name of three biblical men…
“The priest of Midian,” Moses' father-in-law (Exodus 2:18) = Raguel (Numbers 10:29). If he be identified with Jethro, then this may be regarded as his proper name, and Jether or Jethro (i.e., “excellency”) as his official title.
“Moses’ father in law is also called Reuel (Exodus 2:18) and Raguel (Numbers 10:29). These are probably two forms of his given name, while the name Jethro was associated with his priestly office (Exodus 18:1)” (Dr. Henry M. Morris, The Defender's Bible).