John Gill Bible Commentary

And Esau was forty years old,.... The same age his father was of when he married, Gen 25:20, when he took to wife Judith, the daughter of Beeri the Hittite; Josephus (m) makes her to be the same with Aholibamah; but her father's name was Zibeon, and an Hivite, and must therefore be another person, not only the name being different, but the tribe, Gen 36:2, and Bashemath the daughter of Elon the Hittite; whom Aben Ezra takes to be the same with Adah, and so does Josephus; and in this they may be right, since the name of her father, and his nation or tribe, agree, Gen 36:2. The fathers of these two women are represented by Josephus as men of great power and authority among the Canaanites, as very probably they were. Esau had another wife of the same name with this last, but she was daughter of Ishmael, and sister of Nebajoth, Gen 36:3; for he had more wives than those; these were his two first, who very probably were not taken together, but one after another, though it may be but at a short distance from each other. (m) Antiqu. l. 1. c. 18. sect. 4.