Bashemath is the name of two women in Esau’s family, and Genesis can seem to give them different fathers. Genesis 26:34 says Esau took Judith and “Bashemath the daughter of Elon the Hittite”, while Genesis 36:3 speaks of Bashemath, Ishmael’s daughter and the sister of Nebajoth. Her son Reuel fathers four chiefs, “duke Nahath, duke Zerah, duke Shammah, duke Mizzah”, in Edom. The text does not explain the difference, and readers have offered more than one answer. Read Genesis 36:1-17 to see how Esau’s household grew into the nation of Edom.
6 verses
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:
And Bashemath Ishmael's daughter, sister of Nebajoth.
And Adah bare to Esau Eliphaz; and Bashemath bare Reuel;
These are the names of Esau's sons; Eliphaz the son of Adah the wife of Esau, Reuel the son of Bashemath the wife of Esau.
And these are the sons of Reuel; Nahath, and Zerah, Shammah, and Mizzah: these were the sons of Bashemath Esau's wife.
And these are the sons of Reuel Esau's son; duke Nahath, duke Zerah, duke Shammah, duke Mizzah: these are the dukes that came of Reuel in the land of Edom; these are the sons of Bashemath Esau's wife.
Matthew George Easton, 1897
Sweet-smelling. (1.) The daughter of Ishmael, the last of Esau’s three wives (Gen. 36:3, 4, 13), from whose son Reuel four tribes of the Edomites sprung. She is also called Mahalath (Gen. 28:9). It is noticeable that Esau’s three wives receive different names in the genealogical table of the Edomites (Gen. 36) from those given to them in the history (Gen. 26:34; 28:9).
(2.) A daughter of Solomon, and wife of Ahimaaz, one of his officers (1 Kings 4:15).
William Smith, 1884
(fragrant, pleasing), daughter of Ishmael, the last married of the three wives of Esau. (Genesis 26:34; 36:3,4,13) (B.C. after 1797.) In (Genesis 28:9) she is called Mahalath.