Esau is Idumeans. Esau married a mutant canaanite, aholibamah... She is the grand daughter of King Seir, a mutant Horim. Horims are cavemen, troglodytes. The lineage of Esau is always mingled with the lineage of a mutant/Seir in scripture. Because Esau chose to defile his lineage to piss off Isaac and Rebekah.