- Jayyānī, al-Ḥusayn ibn Muḥammad, 1035-1105?1
- Jazūlī, Yaḥyá ibn Mūsá1
- Jaʻfar Astarābādī1
- Jaʻfar Vāʻiẓ1
- Kabbāshī, Aḥmad1
- Kamāl al-Dīn Turkumānī1
- Kamāl al-Dīn ibn Āsāyish Shirwānī1
- Karim Khan Kermani1
- Khalīl Ibn Walī1
- Khalīl ibn Shāhīn1
- Khalīl ibn al-Ghāzī Qazwīnī1
- Khaqani1
- Khayr al-Din al-Ramli1
- Khuwarizmī, Jamāl al-Dīn Abu Bakr1
- Kindī, ʻAmr ibn al-ʻĀṣ1
- Kirmānī, Muḥammad ibn ʻAlī1
- Kulaynī, Muḥammad ibn Yaʻqūb, -941?1
- Kurdī, Yūsuf ibn Yaʻqūb1
- Maghnīsāwī, Maḥmūd ibn Ḥasan1
- Mahdī ibn ʻAlī Ṣubunrī1