List of Famous people with last name Billah

Abu Mansur Nizar, known by his regnal name as al-Aziz Billah, was the fifth caliph of the Fatimid dynasty, from 975 to his death in 996.

Abū Muḥammad ʿAbd Allāh/ʿUbayd Allāh ibn al-Ḥusayn, 873 – 4 March 934, better known by his regnal name al-Mahdi Billah, was the founder of the Isma'ili Fatimid Caliphate, the only major Shi'a caliphate in Islamic history, and the eleventh Imam of the Isma'ili faith.

Abu Tahir Isma'il, better known by his regnal name al-Mansur bi-Nasr Allah, was the third caliph of the Fatimid Caliphate in Ifriqiya, ruling from 946 until his death. He presided over a period of crisis, having to confront the large-scale Kharijite rebellion of Abu Yazid. He succeeded in suppressing the revolt and restoring the stability of the Fatimid regime.