In addition he married Basemath, daughter of Ishmael and sister of Nebaioth.
These were the names of the sons of Ishmael according to their family genealogy: Nebaioth (firstborn), Kedar, Adbeel, Mibsam,
When Esau was 40, he married Judith, daughter of Beeri the Hittite, as well as Basemath, daughter of Elon the Hittite.
So he went to Ishmael's family and married an additional wife—Mahalath, the daughter of Ishmael, Abraham's son, the sister of Nebaioth.
These were the names of Esau's sons: Eliphaz, son of Esau's wife Adah, and Reuel, son of Esau's wife Basemath.
Esau married two Canaanite women: Adah, daughter of Elon the Hittite, and Oholibamah, daughter of Anah, and granddaughter of Zibeon the Hivite.
Adah had a son for Esau named Eliphaz. Basemath had Reul.