Yahya ibn Umar
Yaḥyā ibn ʿUmar was an Alid Imam. In the days of the Abbasid caliph Al-Musta'in, he marched out from Kufa and lead an abortive uprising from Kufa in 250 A.H. (864-65 CE), but was killed by the Abbasid forces led by Husayn ibn Isma'il, who had been sent to deal with him.