Al-Layth ibn Sa'd
Al-Layth ibn Saʿd ibn ʿAbd Al-Raḥmān Al-Fahmi Al-Qalqashandī was the chief representative, imam, and eponym of the Laythi school of Islamic Jurisprudence. He was regarded as the scholar of Egypt, even for decades following his death in 791 CE. He belongs to the Arabian tribe of Banu Fahm, who migrated to Egypt in the 7th century under the Umayyad Caliphate. He was born in 713 CE in Qalqashanda, a village in Egypt and so his nisba is Al-Qalqashandī. Despite his Arab origin, Al-Dhahabi mentioned in his encyclopaedia Siyar a`lam al-nubala that his family claimed a Persian origin and this became a common reference for later writers
He presided over the first trial of Elias of Heliopolis for apostasy in 779.
