Comentario sobre Génesis 22:21

את עוץ בכורו, as we explained already on Genesis 10,15 in connection with the phrase את צידון בכורו.

קמואל אבי ארם. According to Nachmanides, Aram is mentioned in order to have an excuse to mention Kemuel, to show that Kemuel’s son Aram became far more distinguished than his father. [normally, the Torah lists the names of people as “son of such and such.” The reverse here indicates that the son outshone the father. Ed.]

את עוץ בכורו, “his firstborn son Utz, etc.; according to B’reshit rabbah this is a reference to Job (Job, 1,1) where we are told about Job living in the land of Utz.