Bede

And the Horites in the mountains of Seir. Indeed, these mountains, along with the neighboring regions, were possessed by the sons of Esau, who was also called Seir, because he was hairy, after the Horites were expelled. However, it seems likely that it was not he (i.e., Esau) himself, but another Seir from whom the mountains of Seir took their name: namely, the patriarch of the Horites, from whose lineage Esau took a wife. …

Commentary on Genesis (Hexaemeron) ↗