Ayatollah Haydar al-Sadr (; 1891–1937) was born in Samarra, Iraq. His father, Ismail as-Sadr (d. 1920) was a Grand Ayatollah and the first to be use the as-Sadr surname, which came to be associated with a long line of religious scholarship within Shia Islam.
Ayatollah Haydar al-Sadr, born in Samarra, Iraq in 1891 (d. 1937), was the son of Ismail as-Sadr, who was a Grand Ayatollah and first used the as-Sadr name, which subsequently became linked with an extended family of religious scholars within Shia Islam.