Both Hittites, the worst of the Canaanites, Ezekiel 16:3; which, from his grandfather Abraham's severe charge, Genesis 24:3, he must needs know would be highly displeasing both to God and to his parents. And as Esau had several names, being called also Edom and Seir; so it seems these women and their parents had, by comparing this with Genesis 36:2, which was usual in those times and places. Or Esau had more wives than these.
Related Commentaries of Genesis 26:34
Genesis 26:34
34 And Esau was forty years old when he took to wife Judith the daughter of Beeri the Hittite, and Bashemath the daughter of Elon the Hittite: