This sect was named after its founder Ahmad bin Muhammad bin Hanbal who was an Arab.
He was born in Baghdād in 164 A.H. He started his studies there at the age of 15. He studied under both Imam al-Shāfi‛ī's and ‛Ali Abī Yusif al-Qādī (Abī Hanīfah's student.) He also studied under different scholars of his time, such as Harīz, one of Imām Sādiq's (a) students.
This sect was spread like the other sects. This sect is still practiced in the Arabian Peninsula and other parts of the Islamic world. Ahmad bin Hanbal died in Baghdād in 241 A.H.