40 And these are the names of the dukes that came of Esau, according to their families, after their places, by their names; duke Timnah, duke Alvah, duke Jetheth, 41 Duke Aholibamah, duke Elah, duke Pinon, 42 Duke Kenaz, duke Teman, duke Mibzar, 43 Duke Magdiel, duke Iram: these be the dukes of Edom, according to their habitations in the land of their possession: he is Esau the father of the Edomites.
This genealogy concludes by naming another set of dukes that came of Esau. These are not the same dukes that were named among his sons and grandsons, so my assumption is that these are the dukes of a later generation, perhaps the generation when the Israelites returned from Egypt.
Finally, we get this emphatic exclamation “he is Esau the father of the Edomites!” Like Ishmael, Esau did not inherit the covenant, but he was still the father of a great people. Unlike Ishmael, though, it is not clear where the people of Esau are today. Were they defeated by one of the many powers that rolled through the land of Canaan? Did they intermingle with other cultures to the point that their bloodlines were dispersed throughout the world? Are they a people that we now call by another name, not even aware of their heritage? I do not know, but for the rest of the Biblical record they will still be frequent actors in the unfolding drama.