Abu Hafsa Yazid ( ar, ابو حفص يزيد , translit=Abū Ḥafṣa Yazīd) was a ''mawla'', or servant, of the Umayyad dynasty, Umayyad Caliph Marwan I, Marwan ibn al-Hakkam (). Yazid's full name is not known; ''Abu Hafsa'' means "father of Hafsa" (see Arabic name). Marwan freed Yazid and assigned him posts including taxation in Medina. He married the daughter of the'' amir'' of al-Yamama, and among their descendants were several prominent poets of the early Islamic period, including Marwan ibn Abi Hafsa and Marwan ibn Abi al-Janub. Abu Hafsa Yazid's origins are unclear; he may have been either Persian people, Persian or Jews, Jewish. He may have been taken prisoner as a youth in the capture of Istakhr in ca 650 CE, and later sold to the Caliph. He was freed on the day of the assassination of Uthman ibn Affan. Sources vary as to whether Abu Hafsa Yazid converted to Islam or retained his Judaism, Jewish faith. Abu Hafsa Yazid is sometimes described as court physician to the Caliph Umar I around the year 643 CE, however this may be an error based on writings by later Arabian history, Arab historians, as he is not called a physician in the earliest texts.

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{{DEFAULTSORT:Abu Hafsa Yazid Physicians from the Umayyad Caliphate Medieval Jewish physicians Jews from the Umayyad Caliphate Year of birth unknown Year of death unknown 7th-century Iranian physicians 7th-century people from the Umayyad Caliphate 7th-century Jews