What does Genesis 36:18 mean?
Previous verses listed the names of Esau's sons and grandsons (Genesis 36:9–14). The earlier list was arranged according to birth mothers. This is part of a segment repeating those names as "chiefs" of Edom (Genesis 36:1).These chiefs appear to be major leaders among the Edomites. They include the sons of Esau's wife Oholibamah: Jeush, Jalam, and Korah. The name Korah is listed under two of Esau's wives. It's possible each had a son by the same name.