Amalek

Amalek (Hebrew for dweller in a valley) was the son of Eliphaz and the 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.

He is often viewed as a metaphor for atheism, and a method of explaining doubt of God as the lowest moral state.

External links

http://www.aish.com/purimthemes/purimthemesdefault/Remembering_Amalek.asp