Wikipedia
Al-Mufawwad
Ja'far ibn al-Mu'tamid, better known by his regnal name of al-Mufawwad ila-llah (, "Agent of God"), was a son of the Abbasid caliph al-Mu'tamid and heir-apparent of the Caliphate from 875 until his sidelining by his cousin al-Mu'tadid in 891.