Hormuzan

Hormuzan was an Iranian aristocrat who served as the governor of Khuzestan, and was one of the Sasanian military officers at the Battle of alQdisiyyah. 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 UbaidAllah, the deceased caliphs son.

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Source: Wikipedia