Isma'ilism

Ismāʿīlism is a branch of Shia Islam. The Ismāʿīlī get their name from their acceptance of Imam Ismaʻil ibn Jafar as the appointed spiritual successor to Ja'far al-Sadiq, wherein they differ from the Twelvers who accept Musa al-Kadhim, younger brother of Ismaʻil, as the true Imām.