Basemath is known as one of Esau's wives. In Genesis 36, she is identified as the daughter of Ishmael and sister of Nebajoth, and she became the mother of Reuel. The name Basemath appears several times in Genesis, which has sparked discussion about identification, since another Basemath is mentioned as the daughter of Elon the Hittite.
Esau took Basemath, the daughter of Ishmael and sister of Nebajoth, as his wife, in addition to his other wives. This marriage was likely an attempt to please his parents after they disliked his Hittite wives.
17These were the sons of Esau's son Reuel: Chief Nahath, Chief Zerah, Chief Shammah, Chief Mizzah. These were the chiefs descended from Reuel in the land of Edom; they were the descendants of Esau's wife Basemath.
6Esau saw that Isaac had blessed Jacob and sent him to Paddan-aram to take a wife from there, and that when he blessed him he charged him, "Do not take a wife from the daughters of Canaan,"