Author
- Jaafar Al-Sadiq1
- Jabartī, Ḥasan ibn Ibrāhīm, 1698 or 1699-1774?1
- Jaghmini1
- Jai Singh II1
- Jalal Al-Din Al-Khabazi1
- Jalal al-Din Davani1
- Jalal al-Din Mohammad Tabrizi1
- Jamāl al-Dīn Aḥmad ibn Muḥammad Ẓāhirī1
- Jaʻfar Astarābādī1
- Jaʻfar Vāʻiẓ1
- John Gower1
- John of Genoa1
- Juan Páez de Castro1
- Junayd ibn Sandal Baghdādī1
- Kabbāshī, Aḥmad1
- Kalb Ḥusayn ibn Faz̤l ʻAlī Tabrīzī1
- Kamal Khujandi1
- Kamal ad-Din Bina'i1
- Kamal al-Din al-Ghazzi1
- Kamāl al-Dīn Ḥusayn ibn Ḥasan Khvārazmī1