Abu Ja'far Ahmad ibn Yusuf ibn Hud , known by the regnal name al-Musta'in Billah , was the fourth member of the Banu Hud family to rule the Taifa of Zaragoza. He ruled from 1085 to 1110. He was the son of Yusuf al-Mu'taman ibn Hud.

He died in the battle of Valtierra on 24 January 1110.

References