Tahir ibn Husayn (776–822)
Born 776 CE, died 822 CE.
Ṭāhir ibn Ḥusayn (Arabic: طاهر بن الحسين, Tahir bin al-Husayn), also known as Dhul-Yamīnayn (Arabic: ذو اليمينين, "the ambidextrous"), and al-Aʿwar (Arabic: الأعور, "the one-eyed"), was a general and governor during the Abbasid Caliphate. Specifically, he served under al-Ma'mun during the Fourth Fitna and led the armies that would defeat al-Amin, making al-Ma'mun the caliph. Tahir bin al-Husayn was then appointed governor of Khorasan as a reward, which marked the beginning of the Tahirids.
Text from the Wikipedia article Tahir_ibn_Husayn, licensed CC BY-SA 4.0.