644 deaths

Umar ibn al-Khattab (; ), also spelled Omar, was the second Rashidun caliph, ruling from August 634 until his assassination in 644. He succeeded Abu Bakr () and is regarded as a senior companion and father-in-law of the Islamic prophet Muhammad.

Persian sasanian soldier, murder of caliph Omar

Bishop of Rochester; Archbishop of York; Saint

Hormuzan (Middle Persian: Hormazdān, New Persian: ) was a Persian aristocrat who served as the governor of Khuzestan, and was one of the Sasanian military officers at the Battle of al-Qādisiyyah. He was later taken prisoner by the Muslims after the fall of Shushtar in 642. Two years later, he was accused of the assassination of the Rashidun caliph Umar, and was killed by Ubayd Allah, the deceased caliph's son.

7th-century governor of the city of Mecca