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