31 These are the kings who reigned in the land of Edom, before any king reigned over the Israelites. 32 Bela the son of Beor reigned in Edom, the name of his city being Dinhabah. 33 Bela died, and Jobab the son of Zerah of Bozrah reigned in his place. 34 Jobab died, and Husham of the land of the Temanites reigned in his place. 35 Husham died, and Hadad the son of Bedad, who defeated Midian in the country of Moab, reigned in his place, the name of his city being Avith. 36 Hadad died, and Samlah of Masrekah reigned in his place. 37 Samlah died, and Shaul of Rehoboth on the Euphrates reigned in his place. 38 Shaul died, and Baal-hanan the son of Achbor reigned in his place. 39 Baal-hanan the son of Achbor died, and Hadar reigned in his place, the name of his city being Pau; his wife's name was Mehetabel, the daughter of Matred, daughter of Mezahab.
This passage is different from the adjacent passages, suggesting that it was an insertion. Since Esau was Edom, the king of that region who came before the Israelites could only be Esau.