- Judeo-Arabic literature1
- Judeo-Persian language1
- Julius III, Pope, 1487-15551
- Jumʻah1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Miṣbāḥ fī sharḥ al-Miftāḥ1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Sharḥ Farāʼiḍ al-Sirājīyah1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá al-Muṭawwal1
- Jābir ibn Ḥayyān1
- Jāmiʻ al-Azhar1
- Jāmiʻ al-ṣaḥīḥ (Muslim ibn al-Ḥajjāj al-Qushayrī)1
- Kanz al-daqāʼiq (Nasafī, ʻAbd Allāh ibn Aḥmad)1
- Karaitic literature1
- Kavvanot (Cabala)1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khwājahʹzādah, Muṣṭafá ibn Yūsuf, -1487 or 14881
- Khānaqāh-i Niʻmat Allāhī1
- Kings and rulers--Heraldry1
- Kirchmair, Georg, 1481-15541
- Knowledge, Theory of1
- Kārtavīryārjuna (Hindu deity)1