- Ibn al-Najjār, Taqī al-Dīn Muḥammad ibn Aḥmad, 1492 or 1493-1564 or 1565. Mukhtaṣar al-Taḥrīr3
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Nuzʹhat al-naẓar fī tawḍīḥ Nukhbat al-fikar3
- Ijtihād (Islamic law)3
- Intention--Religious aspects--Islam3
- Iqnāʼ (Ḥujāwī, Mūsá ibn Aḥmad)3
- Iran--Tabrīz3
- Iraq--Karbalāʼ3
- Ishrāqīyah3
- Islam and philosophy3
- Islam--Prayers and devotions3
- Istiṣḥāb (Islamic law)3
- Judges (Islamic law)3
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Sharḥ Farāʼiḍ al-Sirājīyah3
- Jāmiʻ al-Azhar3
- Kaydānī. Fiqh al-Kaydānī3
- Khabbāzī, ʻUmar ibn Muḥammad, 1231 or 2-1292. Mughnī fī uṣūl al-fiqh3
- Kings and rulers--Religious aspects3
- Kitāb (Sībawayh, ʻAmr ibn ʻUthmān)3
- Knowledge, Theory of (Islam)3
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)3