Zayd ibn Ali

Zayd ibn ʿAlī, also spelled Zaid, was the son of Ali ibn Husayn, and great-grandson of Ali. He led an unsuccessful revolt against the Umayyad Caliphate, in which he died. The event gave rise to the Zaidiyyah sect of Shia Islam, which holds him as the next Imam after Ali ibn Husayn. In contrast, his elder half-brother Muhammad al-Baqir is seen as the next Imam of the Twelver and Isma'ili Shias. Nevertheless, he is considered an important revolutionary figure by Shias and a martyr (shaheed) by all schools of Islam, Sunnis and Shias. The calling for revenge for his death, and for the brutal display of his body, contributed to the Abbasid Revolution.