Namesakes for Umar

Namesakes for UMAR:
  Islamic Caliphs: 2 caliphs
      Caliph Umar ibn Al-Khattab   634-644   Rashidun  
      Caliph Umar II ibn Abd al-Aziz   717-720   Umayyad  

  Notable Philosophers and Thinkers: 1 mathematician
      Omar Khayyám (a.k.a. Umar)   1048-1131  

  Notable Writers: 1 poet
      Omar Khayyám (a.k.a. Umar)   1048-1131