Mezue ahịrịokwu na-esonụ: Ṭāhir ibn Ḥusayn (, "Tâhereben Hoseyn";, "Tahir bin al-Husayn"), nke a makwaara dị ka Dhul-Yamīnayn (, "nke nwere aka abụọ"), na al-Aʿwar (, "onye nwere otu anya"), bụ onye ọchịagha Iran na gọvanọ n'oge caliphate Abbasid. Kpọmkwem, o jere ozi n'okpuru al-Ma'mun n'oge
Nke anọ Fitna ma duru ndị agha ga-emeri al-Amin, na-eme al-Ma'mun "caliph". Mgbe ahụ, a kwụghachiri ya ụgwọ dị ka gọvanọ nke Khorasan, nke gosipụtara mmalite nke usoro ndị ọchịchị Tahirid.