In Genesis 26:34-35 (NASB)
When Esau was forty years old he married Judith the daughter of Beeri the Hittite, and Basemath the daughter of Elon the Hittite; 35 and they brought grief to Isaac and Rebekah.
in Genesis 28:9 (NASB)
and Esau went to Ishmael, and married, besides the wives that he had, Mahalath the daughter of Ishmael, Abraham’s son, the sister of Nebaioth.
and in Genesis 36:2-3 (NASB)
2 Esau took his wives from the daughters of Canaan: Adah the daughter of Elon the Hittite, and Oholibamah the daughter of Anah, the granddaughter of Zibeon the Hivite; 3 also Basemath, Ishmael’s daughter, the sister of Nebaioth.
Searching with the terms "esau's wives" in Google I get the following result
Spouse: Judith, Mahalath, Adah