al-Mustakfi bi'llah II Sulayman ibn al-Mutawakkil

Al-Mustakfi billah II, Abu al-Rabi' Sulayman ibn al-Mutawakkil, an Abbasid caliph in Cairo who ruled from 845 to 854 AH. ²

He came to the caliphate by an appointment from his full brother al-Mu'tadid. Al-Suyuti says that his father wrote out for him a copy of the deed. In Shadharat al-Dhahab, he was given the allegiance on the day his brother al-Mu'tadid died in 845 AH. ^{2 3}

Al-Suyuti describes him as one of the righteous caliphs, a pious worshipper who prayed much, recited and kept silence, withdrawn from people, and of good conduct. His brother al-Mu'tadid said that he had seen no great sin in him since he grew up. The father of al-Suyuti was an imam with a high place with him. ²

He died on Friday, the last day of Dhu al-Hijja 854 AH at the age of sixty-three. The sultan walked in his funeral and carried his bier himself. The father of al-Suyuti did not live after him more than forty days. ²