- Jerome, Saint, -419 or 4202
- Jewish magic2
- Jewish poetry2
- Jewish sermons2
- Jewish sermons, Hebrew2
- Jews, Italian2
- Jews--Dietary laws2
- Jighmīnī, Maḥmūd ibn Muḥammad, -1221? Mulakhkhaṣ fī al-hayʼah2
- Jāmiʻ al-Azhar2
- Karaites2
- Khalwatīyah2
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)2
- Khawwāṣ, Aḥmad ibn ʻAbbād, 1378?-1454. Kāfī fī ʻilmay al-ʻarūḍ wa-al-qawāfī2
- Kirātārjunīya (Bhāravi)2
- Kumārasambhava (Kālidāsa)2
- Kārtavīryārjuna (Hindu deity)2
- Language and languages--Philosophy2
- Letter writing2
- Letter writing, Hebrew2
- Limp bindings2