Abu'l-Futuh al-Hasan ibn Ja'far (Arabic: أبو الفتوح الحسن بن جعفر) was the Sharif of Mecca for the Fatimid Caliphate from 994/5 until 1010.
[3] In July 1010, at the instigation of Abu'l-Qasim al-Husayn ibn Ali al-Maghribi, a former Fatimid vizier, he was briefly acclaimed as anti-caliph with the title of al-Rashid bi-llah ("Righteous with God") during the Jarrahid-led Bedouin revolt against the Fatimid rule in Palestine.
He raised a considerable sum of money and joined the rebels in their capital of Ramla, where he was initially warmly received and acclaimed as "Commander of the Faithful".
However, the unprecedented decision to actually proclaim a counter-caliphate clearly had ideological motivation as well, being possibly prodded by al-Hakim's demand in 1005 to ritually curse the first two Rashidun caliphs across the Fatimid domains.
[6] Abu'l-Futuh also briefly occupied Medina, ruled by a rival Husaynid family, the Banu Muhanna.