(born
c. AD 586, Mecca, Arabian Peninsula — died Nov. 3, 644, Medina) Second Muslim caliph (634 – 644). He initially opposed the Prophet
Muhammad but became a Muslim
c. 615. His daughter
Haf
sah married Muhammad in 625. He was nominated by
Abu Bakr as his successor. As caliph he spread Islam to Egypt, Syria, and Persia. His innovations affected taxation, social welfare, and the empire's entire financial and administrative fabric, and he was noted for his justice, social ideals, and candour.
For more information on 'Umar ibn al-Khattab, visit Britannica.com.