Author
- Isḥāq ibn Ḥasan Tūqādī1
- Izz al-Din ibn 'Abd al-Salam1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Jaafar Al-Sadiq1
- Jamāl al-Dīn Aḥmad ibn Muḥammad Ẓāhirī1
- Jarmakī, Abū Bakr ibn al-Ṭāhir, 18th cent1
- Jayyānī, al-Ḥusayn ibn Muḥammad, 1035-1105?1
- John Gower1
- John of Glastonbury1
- Juan Páez de Castro1
- Junayd ibn Sandal Baghdādī1
- Kabbāshī, Aḥmad1
- Kamal Khujandi1
- Kamāl al-Dīn ibn Āsāyish Shirwānī1
- Kanō Gensen1
- Karakaşzade Ömer1
- Karim Khan Kermani1
- Kaḥḥāl, ʻAlī ibn ʻĪsá, -1038 or 10391
- Khalaf Barbarī1
- Khalwatī, Muḥammad1