Author
- Jaghmini1
- Jahangir Mirza Qajar1
- Jai Singh II1
- Jakob Eduard Polak1
- Jalal al-Din Mohammad Tabrizi1
- Jamāl al-Dīn Ḥaṣīrī1
- Jamālī Ardistani1
- Jawad al-Amili1
- Jayyānī, al-Ḥusayn ibn Muḥammad, 1035-1105?1
- Jaʻfar Vāʻiẓ1
- Jaʻfar ibn al-Ḥusayn Shūshtarī1
- John Gower1
- John of Genoa1
- John of Glastonbury1
- Juan Páez de Castro1
- Kabbāshī, Aḥmad1
- Kalb Ḥusayn ibn Faz̤l ʻAlī Tabrīzī1
- Kalim Kashani1
- Kamal ad-Din Bina'i1
- Kamal al-Din ibn al-Humam1