Samael
In Jewish beliefs, Sammael is said to be the Angel of Death, the ruler of the Fifth Heaven, and one of the seven regents of the world served by two million angels; he resides in the Seventh Heaven. Yalkut I, 110 of the Talmud says Samael is Esau's guardian angel.  In Sotah 10b, Samael is Esau's guardian angel.