Our 20th Holy Pir Islamdin was born in the Iranian city of Subzwar in A.H 516 on the 21st day of the month of Zilhaj. He served as Ismaili Pir for 25 years.and passed away in A.H. 575. He had three sons - Sayyed Abdul Hadi, Sayyed Jalaludin and Sayyed Salahuddin.

Our 21st Holy Imam Muhtadi was born in the Ismaili fort of Lamastar in Iran. His complete name was Imam Muhtadi al-Mehdi ala-Zikrihisalam. He ascended to the throne of Imamat in A.H. 530. At this time the Chief Dai was Muhammad bin Kiya Buzurg Umid