Ja'far al-Sadiq
Isma'il was born in Shawwal 100 AH/719 AD He was the eldest son of Imam Ja'far al-Sadiq. His mother, Fatima bint al-Hussain'l-Athram bin al-Hasan bin Ali, was the first wife of Ja'far al-Sadiq. He was the brother of Abdullah al-Aftah.