- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʾid fī sharḥ Tajrīd al-qawāʻid1
- Jabbārīyah1
- Jews1
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Judaism2
- Jābir ibn Ḥayyān1
- Jāmiʻ al-ṣaḥīḥ (Bukhārī, Muḥammad ibn Ismāʻīl)1
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)1
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khiḍr (Legendary character)1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Kings and rulers2
- Knowledge, Theory of (Islam)1
- Kāfī (Kulaynī, Muḥammad ibn Yaʻqūb)1
- Kāfī fī al-ʻarūḍ wa-al-qawāfī (Tibrīzī, Yaḥyá ibn ʻAlī)1
- Lacquered bindings9
- Land tenure (Islamic law)1
- Land tenure--Law and legislation1
- Land use--Law and legislation1