Genesis 36:39

And Baal–hanan the son of Achbor died, and Hadar reigned in his stead: and the name of his city was Pau; and his wife’s name was Mehetabel, the daughter of Matred, the daughter of Mezahab.

Cross-reference

In 1 Chronicles 1:50, this same Edomite king is recorded with identical details — Hadar/Hadad succeeding Baal-hanan, same city and wife names.