The Ijtihadi family (or Khandān-e-Ijtihād) is sub-branch of the Naqvis of Darul Ijtihad Jais and Nasirabad. The family uses last name "Naqvi" to denote that they are descendants of the Islamic prophet Muhammad through the lineage of the Imam Ali al-Naqi.
The famous Oudh family of Sayyids of Jais and Nasirabad settled in Rae Bareli during the eleventh century and has remained there since. Naqvi Sadats migrated from Subzwar (Iran) and arrived in Jais around 410 Hijri (around 1027 AD). During the reign of Sher Shah Suri, adjacent Patakpur was also inhabited by Momineens and renamed Nasirabad, after Syed Naseerudin Jaisi. Ayattollah Al Uzma Sayyid Dildar Ali Naqvi 'Gufraanmaab Naseerabadi al Jaisi', his family came to be called Khandan e Ijtihad due to prominence of high-ranking scholars in its midst. Notable religious scholars from this lineage include Syedul Ulema Syed Ali Naqi Naqvi 'Naqqan', Jannat Ma'ab Ayatullah Syed Mohammad Naqvi, Deputy Syed Ali Akbar Naqvi, Ayatullah Syed Ali Anwar Naqvi (Ali Munawwar), Ayatullah Aqa Hasan Sb, Ayatullah Syed Kalbe Hussain Naqvi, Hujjatul Islam Syed Kalbe Abid Naqvi, Malaz-ul-Ulama Syed Hasan Naqvi, Hujjatul Islam Syed Kalbe Jawwad Naqvi, Hujjatul Islam Syed Hasan Zafar Naqvi (based in Karachi), Allama Nasir Ijtehadi, Maulana Syed Sibte Hasan Naqvi, Maulana Dr Syed Mohammad Waris Hasan Naqvi, Dr Kalbe Sadiq, Hujjatul Islam Professor Syed Ali Mohammad Naqvi, Najmul Ulema Ayatullah Syed Ali Naqvi and Mumtazul Ulema Syed Saif Abbas Naqvi
Two main braches of Ijtehadi family are: