- Jamʻ al-jawāmiʻ fī al-uṣūl (Subkī, Tāj al-Dīn ʻAbd al-Wahhāb ibn ʻAlī)2
- Jaʻbarī, Ṣāliḥ ibn Thāmir, d. 1306. Naẓm al-laʼālī2
- Jerome, Saint, -419 or 4202
- Jewish way of life2
- Jews--Dietary laws2
- Jews--Medicine2
- Jugurthine War (111-105 B.C.)2
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Taḥrīr al-qawāʻid al-manṭiqīyah2
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. ḥāshiyah ʻalá Sharḥ Shamsīyah2
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)2
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Asmāʼ al-mubhamah fī al-anbāʼ al-muḥkamah2
- Knowledge, Theory of (Islam)2
- Latin language--Grammar2
- Latin poetry2
- Latin poetry, Medieval and modern2
- Leather bindings2
- Linguistic analysis (Linguistics)2
- Liturgical books2
- Lollards2
- Luca, Jacopo di2