- Izmīrī, Muṣṭafá ibn Rajab, active 17th century1
- Iṣbāḥ1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʾid fī sharḥ Tajrīd al-qawāʻid1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tashyīd al-Qawāʻid1
- Jabbārīyah1
- Jalāl al-Dīn Rūmī, Maulana, 1207-12731
- Jammāʻīlī, ʻAbd al-Ghanī ibn ʻAbd al-Wāḥid, 1146-12031
- Jamālī, Fuḍayl ibn ʻAlī, 1514-1583. ʻAwn al-rāʼiḍ fī fann al-farāʼiḍ1
- Jamʻ bayna al-ṣaḥīḥayn (Ḥumaydī, Muḥammad ibn Fattūḥ)1
- Jawharat al-tawḥīd (Laqānī, Ibrāhīm ibn Ibrāhīm)1
- Jawharī, Ismāʻīl ibn Ḥammād, -1003? Tāj al-lughah wa-ṣiḥāḥ al-ʻArabīyah1
- Jawshan al-kabīr1
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 3-1331 or 2. Jamīlat arbāb al-marāṣid fī sharḥ ʻAqīlat atrāb al-qaṣāʾid1
- Jewelry--Religious aspects--Islam1
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Jihad1
- John, of Damascus, Saint1
- Judicial process (Islamic law)1
- Juhd al-muqill (Sājaqlīzādah, Muḥammad ibn Abī Bakr)1
- Jurisprudence1