Sejfullah Efendi Proho (1859-1932) was a member of the prominent Proho family in the town of Konjic (Belgradecik) in today’s Republic of Bosnia and Herzegovina. Sejfullah Proho was a famous expert on sharia sciences in Bosnia and Herzegovina, with a high level of education as a result of studying in Konjic, Sara-jevo, and Istanbul. Proho took lessons from distinguished teachers and worked for many years as a Professor of Islamıc Law at the Sharia Law School in Bosnia and Herzegovina. Sejfullah Proho was a prolific writer of Bosnian heritage, was consi-dered the best expert on Islamic law (Fiqh) of his time, and left many works in Ara-bic, Turkish, and Bosnian. Sejfullah Proho attached great importance to developing the Bosnian language and is among the scholars who argue that scientific works should be written in Bosnian. As a matter of fact, he was one of the first represen-tatives of the generation who wrote in Bosnian. Although he has written works in many fields such as civil law, family law, basic legal issues, and Qur’anic sciences, he was a scholar mostly competent in the field of inheritance law. Proho was one of the late Ottoman scholars and is considered one of the last representatives of the traditionalist interpretation of religion through the effects of the political events of that period being inseparable from the important scholars of the period. The scientific process of an expert and talented scholar like Sejfullah Proho, who lived between Bosnia and Istanbul, is very important for both Istanbul and Bosnia.