Muhammad al-Baqir
His full name is "Aḥmad ibn Isa Ar-Rumi ibn Muḥammad An-Naqib ibn 'Ali al-Uraidhi ibn Ja'far al-Sadiq ibn Muhammad al-Baqir ibn Ali Zayn al-Abidin ibn al-Husain ibn Ali bin Abu Talib". According to another history, he is thought to have been born in 241 Hijrah (820 CE).