1) Tribe of Arabia 
The Hilalians or Bani Hilal (Arabic: بنو هلال) were a confederation of Arab tribes of the Hejaz and Najd who emigrated to North Africa in the eleventh century. Masters of the vast plateaus of Najd, the Bani Hilal had a very bad reputation. Recent converts to Islam, they were known for their depredations on the borders of Iraq and Syria. Wit...