Question: Who is Isma'Il Ibn Ja'Far's paternal grandfather?
Sentence (from "Isma'il 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.
Relevant evidence: No