Muhammad al-Taqi
Imam
Abu al-Husayn Ahmad ibn Abd Allah ibn Muhammad ibn Isma'il, commonly known as Muhammad al-Taqi, was a descendant of the Islamic prophet Muhammad and the ninth of the Isma'ili Imams, succeeding his father, Ahmad al-Wafi. Wikipedia
Born: 812 AD, Salamiyah, Syria
Died: 840 AD (age 28 years), Salamiyah, Syria
Children: Abd Allah al-Radi
Grandchild: Abd Allah al-Mahdi Billah
Great grandchild: al-Qa'im
Parents: Ahmad al-Wafi
Great-grandparent: Isma'il ibn Ja'far