Abu Mansur Nizar ibn al-Mustansir was a Fatimid prince, and the oldest son of the eighth Fatimid caliph and eighteenth Isma'ili imam, al-Mustansir. Wikipedia
Born: September 26, 1045, Cairo, Egypt
Died: 1097 (age 52 years), Cairo, Egypt
Grandparents: al-Zahir li-I'zaz Din Allah and Rasad
Parents: al-Mustansir Billah
Successor: Ali al-Hadi (in concealment)