Analysis of information sources in references of the Wikipedia article "Jethro (biblical figure)" in English language version.
Like the rest of the Pentateuch, Exodus contains contradictions and redundancies. For example, Moses' father-in-law is sometimes called Reuel and sometimes Jethro; and the mountain of revelation is Sinai in some passages and Horeb in others.
J names Moses' father-in-law as Reuel or Hobab, whereas E knows him as Jethro, priest of Midian.