, Abu ’l-Ḥasan (or Abū Hās̲h̲im) ʿAlī b. al-Ḥākim bi-amr Allāh, seventh Fāṭimid caliph and the fourth to reign at Cairo in Egypt.
After the death of al-Ḥākim on 27 S̲h̲awwāl 411/14 February 1021, Sitt al-Mulk [q.v.], the latter’s half-sister, refused to recognise the rights of the heir presumptive, Abu ’l-Ḳāsim ʿAbd al-Raḥīm (or ʿAbd al-Raḥmān) b. Ilyās, al-Ḥākim’s cousin, designated walī al-ʿahd by the latter in 404/1014-5 and at the time governor of Damascus (A.F. Sayyid, al-Dawla al-fāṭimiyya , tafsīr d̲j̲adīd , Cairo 1413/1992, 108-9, 117-18). Recalled to Cairo, he alleg…