ʿAbdallāh al-Afṭaḥ ibn Jaʿfar al-Ṣādiq (Arabic: عبدالله الافطح بن جعفر الصادق, d. 766 CE / 149 A.H.)[1] was the eldest son of Ja'far al-Sadiq (after al-Sadiq's death) and the full-brother of Isma'il ibn Jafar.[2] Abdallah's title "al-Aftah" derives from the Arabic words "aftah al-ra’s" (broad-headed) or "aftah al-rijlayn" (broad-footed) used to describe his appearance.[3]