Amalek in Wikipedia
The Amalekites are a people mentioned a number of times in
the Hebrew Bible. They are considered to be descended from
an ancestor Amalek.
According to the Book of Genesis and 1 Chronicles, Amalek
(Hebrew: עֲמָלֵק, Modern Amalek Tiberian ʻĂmālēq), Arabic,
عماليق, was the son of Eliphaz and the grandson of Esau
(Gen. 36:12; 1 Chr. 1:36); the chief of an Edomite tribe
(Gen. 36:16). His mother was a Horite, a tribe whose
territory the descendants of Esau had seized.
According to the genealogy in Gen. 36:12; 1 Chr. 1:36.
Amalek is a son of Esau's son Eliphaz and of the concubine
Timna, a Horite and sister of Lotan. Gen. 36:16 refers to
him as the "chief of Amalek" thus his name can be understood
to be a title derived from that of the clan or territory
over which he ruled. Indeed an extra-Biblical tradition
recorded by Nachmanides relates that the Amalekites were not
descended from the grandson of Esau but from a man named
Amalek after whom this grandson was later named. Such an
eponymous ancestor of the Amalekites is also mentioned in
Old Arabian poetry.
According to Arab historians such as Ibn Khaldun and Ali ibn
al-Athir, Amalek is a name given to the Amorites and the
The name is sometimes interpreted as "dweller in the valley"
  , but most specialists regard the origin to be
unknown (M. Weippert, Semitische Nomaden des zweiten
Jahrtausends. Biblica vol. 55, 1974, 265-280, 427-433).
In (Arabic: عملاق,ʿimlāq) is the singular of giant, and the
plural is (عمالقة, ʿamāliqah) or (عماليق, ʿamālīq),
suggesting the sons of this tribe were known for being