Sirāj ad-Din Muzaffa ibn al-Husain (fl. 1227–1238)
Taj ad-Din Abu'l-Futūh ibn Muhammad (d. after 1249)
Radi ad-Din Abu'l-Ma'āli (fl. 1256)
Najm ad-Din (d. 1274)
Shams al-Din, son of Najm ad-Din (fl. 1274).
Note that this list does not include the da'i and
Imams that ruled the
Nizari Isma'ili State from 1090 to 1255, beginning with Hassan-i Sabbah.
References
Baldwin, Marshall W., and Setton, Kenneth M. (1969), A History of the Crusades: Volume One, The First Hundred Years,
Chapter IV: The Ismailites and the Assassins, The University of Wisconsin Press, Madison.