- Iqnāʼ (Ḥujāwī, Mūsá ibn Aḥmad)3
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ3
- Islamic sects3
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Maṭāliʻ al-anẓār3
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah3
- Kaydānī. Fiqh al-Kaydānī3
- Khabbāzī, ʻUmar ibn Muḥammad, 1231 or 2-1292. Mughnī fī uṣūl al-fiqh3
- Khiḍr (Legendary character)3
- Kings and rulers--Duties3
- Kinship (Islamic law)3
- Kitāb (Sībawayh, ʻAmr ibn ʻUthmān)3
- Knowledge, Theory of (Islam)3
- Legacies (Islamic law)3
- Legends3
- Letter writing, Arabic3
- Liturgics3
- Manuscripts, Samaritan3
- Manāzil al-sāʼirīn (Anṣārī al-Harawī, ʻAbd Allāh ibn Muḥammad)3
- Manẓūmah al-Bayqūnīyah (Bayqūnī, Ṭāhā ibn Muḥammad)3
- Maqdisī, Muḥammad ibn ʻAlī, d. 1417. Niẓām al-mudhahhab fī mufradāt al-madhhab3