`Umar ibn al-Khattāb (c. 584 - November 7, 644), sometimes referred by Sunni Muslims as `Umar al-Farūq ("Umar the Distinguisher (between Truth and Falsehood)"), and is regarded by them as the second of the four "Khulafā' ar-Rashīdīn" ('rightfully-guided caliphs'). also known in English as Omar or Umar, was from the Banu Adi clan of the Quraysh tribe. Wikipedia