836 births

Abū al-ʿAbbās Aḥmad ibn Muḥammad al-Mustaʿīn bi-ʾllāh (; 836 – 17 October 866), better known by his regnal title al-Mustaʿīn, was the Abbasid caliph from 862 to 866, during the "Anarchy at Samarra". A grandson of Caliph al-Mu'tasim, he was installed on the throne by the Turkic military commanders following the death of al-Muntasir.

Japanese politician (836-891)

Arabic poet of Abbasid era (836–896)