Melchizedek is interesting in that I suspect he is in some way linked to the Code of Hammurabi.
http://ohr.edu/ask_db/ask_main.php/92/Q1/
...’The Code of Hamurabi’ (18th century B.C.E.) is one of the oldest known legal codes on record. I heard from Rabbi Simcha Wasserman, zatzal, that Hamurabi was most likely a dropout from the academy of Shem and Ever...