Umar, also spelled Omar, was one of the most powerful and influential Muslim caliphs in history. The exact date of the birth of Umar is not known, however, is that Umar was born around 579 AD, at Mecca. He was younger than the Holy Prophet of Islam by about ten years. He succeeded Abu Bakr as the second caliph of the Rashidun Caliphate on 23 August 634. Full name: Umar ibn Al-Khattāb Assassinated: November 7, 644 AD, Medina Spouse: Umm Kulthum bint Ali Children: Abdullah ibn Umar, Hafsa bint Umar, Asim ibn Umar, more Nicknames: Omar, Umar I
"Acquire knowledge and impart it to the people."