Who was the brother of XXX?
Ali al-Uraidhi ibn Ja'far al-Sadiq
Ali al-Uraidhi ibn Ja'far al-Sadiq, (Arabic: علي العريضي بن جعفر الصادق‎ ʿAlī al-ʿUrayḍī ibn Jaʿfar al-Sādiq) better known simply as Ali al-Uraidhi, was the son of Ja'far al-Sadiq and the brother of Isma'il, Musa al-Kadhim, Abdullah al-Aftah, and Muhammad Al-Dibaj.
Musa al-Kadhim Abdullah al-Aftah