This is a list of caliphs of the Fatimid Caliphate (909–1171).
List of caliphs
At this point there was a dispute in the succession. The Mustaali cause, given below, was successful in gaining the caliphate, but the Nizari line continued and continues to have many supporters as the legitimate imamate.
References
List of Fatimid caliphs Wikipedia(Text) CC BY-SA