Genesis 36:40

And these are the names of the chieftains of Esau after their kindreds, after the place of their habitation,with their names Rabba Timna, Rabba Alva, Rabba Jetheth,

AND THESE ARE THE NAMES OF THE CHIEFS THAT CAME TO ESAU. At first Scripture enumerated Esau’s grandsons who were chieftains in that generation, and afterwards some of his descendants succeeded in attaining sovereignty. After that their kingdom ceased, and the Edomites once again appointed these chieftains as their head. And so it is said in the book of Chronicles: And Hadad died. And the chiefs of Edom were: the chief of Timna. So did Rashi explain it here in his commentary on this verse.
And that which Scripture says here, according to their families, after their places, by their names, [and in Verse 43], after their habitations in the land of their possessions means that among the previous chiefs, [mentioned above in Verses 15-19], all the brothers who were the chiefs dwelled in one city, ruling one people, or their position was analogous to the princes of the tribes and the heads of families [in Israel]. But these latter ones were chiefs according to their families, meaning that each one was chief of all the families of Esau’s descendants, and in all of their dwelling places, for in that generation he alone was called “chief,” no other person being so called in all the land they possessed. Thus they were as kings in their countries, but they were not enthroned, and the glory of royalty was not bestowed upon them.
In the opinion of many commentators (Verse 31) refers to Saul, king of Israel. Moses who wrote the Torah could therefore know it only by prophecy. this section was written as a prophecy. But this is not correct. Why should prophecy mention these kings, and until what point in time was Scripture to enumerate them and stop? Rather the correct interpretation is that all these ruled before the Torah was given in the days of Moses. Now we may say that they all ruled in one time, and then the explanation of after their places would be that each one ruled in his place, or else their rule lasted but a short time, as Scripture says, But the years of the wicked shall be shortened.

ואלה שמות אלופי עשא למשפחותם למקומותם, among the “Alufim” listed in the verses following there are several who had been mentioned earlier simply as sons of Esau. We must assume that these sons eventually rose in rank to become “Alufim.” We already mentioned that the title “Aluf” essentially means that the people so described were mayors of cities, which is most likely the reason why the Torah adds the word למקומותם, “in their respective locations.” Proof of the correctness of what I surmise may be the fact that in Chronicles all the details provided by the Torah here in this chapter are repeated verbatim. However, the first list of the “Alufim” of the sons of Esau (36,15-19) are not mentioned there at all.

ואלה שמות אלופי עשו, the significance of the additional words למקומותם בשמותם may be that they were not distinguished enough to be recorded by their individual names, but only in association with the location where they practiced their authority.

ואלה, now the Torah mentions eight Alufim who were in positions of leadership after the kingdom of Edom had ceased to exist as such. There were eleven such Alufim.