Amalek - dweller in a valley, the son of
Eliphaz[?] and grandson of
Esau
(Gen. 36:12; 1 Chr. 1:36); the chief of an Idumean tribe (Gen.
36:16). His mother was a Horite, a tribe whose territory the
descendants of
Esau had seized.
From Easton's Bible Dictionary (1897)