Isma'il ibn Jafar

Abu Muhammad Ismāʿīl ibn Jaʿfar al-Mubārak was the eldest son of Imam Ja'far al-Sadiq. He is also known as Isma'il Al-Ãraj ibn Ja'far. Following Ja'far's death, the Shia community split between those who believed the Imamate was passed to Musa ibn Ja'far, who would become the Twelver Shia, and those who believed that the Imamate passed to Isma'il ibn Ja'far, who would become the Isma'ili branch named after Isma'il.

From *.wikipedia.org,

General Info

Male

Date of Birth

January 1st, 0721

Age

1303

Birth Place

Saudi Arabia, Al Madinah Region

Date of Death

January 1st, 0755

Died Aged