أحمد بن زين الدين الأحسائي
Shaykhism is an Islamic religious movement founded by Shaykh Ahmad in the early 19th century Qajar dynasty, Iran, now retaining a minority following in Iran and Iraq. It began from a combination of Sufi and Shia and Akhbari doctrines. In the mid 19th-century many Shaykhis converted to the Bábí and Baháʼí religions, which regard Shaykh Ahmad highly.