The name Jethro means Abundance and is of Hebrew origin. Jethro is a name that's been used primarily by parents who are considering baby names for boys.
In the Bible, Jethro, aka Reuel or Hobab, was in the Old Testament, a priest of Midian of the Kenite clan, with whom Moses took refuge. Moses later married Jethro's daughter.
Jethro Tull, musician. Jethro Bodine, character from the TV show The Beverly Hillbillies.