- 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
- Khalīl Ibn Walī1
- Khalīl ibn Shāhīn1
- Khalīl ibn al-Ghāzī Qazwīnī1
- Khuwarizmī, Jamāl al-Dīn Abu Bakr1
- Khvājah Muḥammad Pārsā1
- Khwājakīzādah, Muṣṭafá ibn Muḥammad, d. 15901