Nizar

Abū Manṣūr Nizār al-Muṣṭafá liDīnillāh (1045-1097, Arabic: أبومنصور نزار المصطفى لدين الله‎) was a Fatimid Caliph and a Nizāri Ismā‘ilī Imām. He was deposed by his brother, Aḥmad al-Musta‘lī but his son, al-Hādī ibn Nizār, escaped to Alamūt and took refuge with believers there, thereby continuing the Imāmate.