New Defender's Study Bible Notes
18:1 Jethro. See note on Exodus 3:1. Indications are that Jethro knew and worshipped the true God; the Midianites were descendants of Abraham, through Keturah, and since Jethro (or Reuel) was a priest of Midian, it seems that at this time in their history the Midianites had not yet descended into paganism. Note Exodus 18:11,12.