- Ibrāhīm ibn ʻAlī Qādirī1
- Ikhnawī, Aḥmad ibn Muḥammad1
- Ismāʻīl Rushdī1
- Ismāʻīl ibn ʻAbd Allāh Khālidī1
- Ismāʻīl Ṭarabzūnī1
- Istānbūlī, Darwīsh Muḥammad ibn Ḥasan1
- Jarmī, Yūnus ibn ʻAlī, active 18th century1
- Jazīrī, Muḥammad ibn Muḥammad, active 18th century1
- Jaʻfar ibn Muḥammad Bashrawānī1
- Jaʻfar ibn Muṣṭafá Nakdahʹwī1
- Jaʻfar ibn Ḥasan Barzanjī1
- Johann von Neuburg1
- Johannes of Regensburg1
- Jundī, Arslān ibn Muḥammad ʻAlī, active 19th century1
- Jābir ibn Ibrāhīm, active 16th century1
- Jābir ibn Sālim Shihāb al-Baghdādī1
- Jīlānī, Ibn Muḥammad Yūsuf, active 17th century1
- Kamal al-Din al-Ghazzi1
- Karmiyānī, Aḥmad ibn Muḥammad1
- Kastamūnī, ʻAbd al-Raḥmān1