Siraj al-Din al-Sajawandi

Abū Tāhir Muhammad Sajāwandī
Born12th century CE
Died1203 CE
Academic background
InfluencesMuhammad ibn Musa al-Khwarizmi, Al Biruni
Academic work
EraIslamic Golden Age
Main interestsIslamic inheritance jurisprudence, mathematics, astrology, geography, theology
Notable worksThe Sirajiyya, The Analogy for the Calculations, Treatise on Algebra
InfluencedAli ibn Mohammed al-Jurjani, Shahab ud-Din Ahmad ibn Mahmud al-Siwasi, Burhan ud-Din Haidar ibn Muhammad al-Hirwi, Shams ud-Din ibn Hamza al-Fanari, Abdul Karim ibn Muhammad al-Hamdani

Sirāj ud-Dīn Muhammad ibn Muhammad ibn 'Abd ur-Rashīd Sajāwandī (Persian: محمد ابن محمد ابن عبدالرشید سجاوندی) also known as Abū Tāhir Muhammad al-Sajāwandī al-Hanafī (Arabic: ابی طاهر محمد السجاوندي الحنفي) and the honorific Sirāj ud-Dīn (سراج الدین, "lamp of the faith") (died c. 1203 CE or 600 AH) was a 12th-century Hanafi scholar of Islamic inheritance jurisprudence, mathematics astrology and geography. He is primarily known for his work Kitāb al-Farāʼiḍ al-Sirājīyah (Arabic:کتاب الفرائض السراجیه), commonly known simply as "the Sirājīyah", which is a principal work on Hanafi inheritance law. The work was translated into English by Sir William Jones in 1792 for subsequent use in the courts of British India. He was the grand-nephew of qari Muhammad ibn Tayfour Sajawandi. He lies buried in the Ziārat-e Hazrat-o 'Āshiqān wa Ārifān in Sajawand.