Hasan bin Sabbah

Hasan bin Sabbah was born in A.H. 432 in the Iranian region of Ray in the city of Qom. His complete name was Al-Hasan bin Ali bin Muhammad bin Jafar bin al-Husayn bin as-Sabbah al-Humeri. Thus it was known that Hasan bin Sabbah was from the royal family of the Humeri from Yemen. Hasan bin Sabbah was born during the time of Imam Mustansir Billah