In Bereishis (36:21, 30), Se'ir's fifth son was called Dishon and his seventh son, Dishan. When the Torah lists their sons (36:26,28), both of them are called Dishan. Who is discussed here?
Radak: Here it reveals that these four sons were of Dishon, Se'ir's fifth son. However, the coming verse calls his brother, the father of Utz and Aran, Dishon! Ezra wrote both Dishon, for they were not particular about which way to pronounce it 1 .
Kol Eliyahu (Bereishis 36:26): Really, both of them were named Dishon, like we find here and in the coming verse 2 . However, when the Trup (cantillation) is Esnachta or Sof Pasuk, this changes it to Dishan. 3 However, Anah's son is called Dishon even when the Trup is Esnachta, e.g. in our verse.
Ramban (Bereishis 36:26): [Also] the Torah freely interchanges their names, unless they are in the same verse (e.g. 21). However, verse 26 needed to say Dishon, lest we think that it is his nephew Dishon ben Anah mentioned in the previous verse.
Here, the first Dishon in our verse is called Ben Anah. We know that the latter Dishon in our verse, and Dishon in the coming verse, are Bnei Se'ir, from their sons (they match their sons listed in Bereishis 36:25-27). (PF)
These notes often change the vowel to Kamatz, e.g. Mayim (Bereishis 1:6), Kesef /Kasef (Shemos 38:17)). (PF)
Here it says Chamran. In Bereishis (36:24) it says Chamdan!
'Rashi': Initially they were Chamudin and Nechmadin (cherished) like Tzadikim. In the end they were ugly like a Chamor (donkey). A donkey is initially cherished, and in the end it is ugly. A horse is initially ugly, and in the end it is beautiful.
Radak: Refer to 1:7:2:3.
