Esau

Esau which is Edom.
Seeing that the daughters of Canaan displeased his father Esau took a wife from Ishmael’s descendants. He took Mahalath (Bashemath) for a wife. Later he had other wives and sons. Eliphaz was born to Adah his wife. Reul was born to Bashemath. Jeush, Jaalam & Korah was born to Aholibamah his wife.
His descendants from these children were the kings that reigned over Edom before there reigned any king over the children of Israel.