Abdulreman ibn Khalid

Abd al-Rahman ibn Khalid ibn al-Walid was the governor of Homs under caliphs Uthman and Mu'awiya I. During Mu'awiya's governorship of Syria (639-661), Abd al-Rahman commanded a number of campaigns against the Byzantine Empire and defended the Upper Mesopotamian frontier from the Iraq-based forces of Caliph Ali. He fought reputably against the latter at the Battle of Siffin in 657 and continued his governorship of Homs and campaigns against the Byzantines after Mu'awiya became caliph in 661. His battlefield reputation and descent from his father, the prominent general Khalid ibn al-Walid, made him particularly popular among the Arabs of Syria. Mu'awiya ultimately perceived him as a potential rival of his own son Yazid, who he was grooming as his successor, which led the caliph to allegedly order Abd al-Rahman's poisoning in 666.