Esau already had two wives. But he went to Ishmael and married another woman. He married Mahalath, the daughter of Ishmael. Ishmael was Abraham’s son. Mahalath was Nebaioth’s sister.
Esau married women from the land of Canaan. Esau’s wives were: Adah, the daughter of Elon the Hittite, Oholibamah, the daughter of Anah, the son of Zibeon the Hivite, and