Dhameystir weedha soo socota: Ṭāhir ibn Ḥusayn (, "Tâhereben Hoseyn";, "Tahir bin al-Husayn"), oo sidoo kale loo yaqaan Dhul-Yamīnayn (, "ambidextrous"), iyo al-Aʿwar (, "hal-indhood"), wuxuu ahaa janaraal iyo taliye reer Iiraan ah intii lagu jiray khaliijkii Cabbaas. Gaar ahaan wuxuu al-Ma'mun u adeegi jiray xilligii
Afaraad Fitna oo hogaamiyay ciidamada jabiyay al-Amin, al-Ma'munna ka dhigay "khaliifka". Kadibna waxaa loo abaalmariyay gudoomiyaha Khorasan, taas oo calaamadeysay bilowgii boqortooyadii Tahirid.