- Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf, 1250-1325. Tahdhīb al-wuṣūl ilá ʻilm al-uṣūl4
- Ibn al-Uqlīshī, Aḥmad ibn Maʻadd, -1155 or 11564
- Ijtihād (Islamic law)4
- Inscriptions, Arabic4
- Intention--Religious aspects--Islam4
- Iran--Iṣfahān4
- Irshād al-adhhān ilá aḥkām al-īmān (Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf)4
- Istiṣḥāb (Islamic law)4
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Maṭāliʻ al-anẓār4
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah4
- Jewish law4
- Jews4
- Jāmiʻ al-Azhar4
- Kanz al-wuṣūl ilá maʻrifat al-uṣūl (Bazdawī, ʻAlī ibn Muḥammad)4
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)4
- Kings and rulers4
- Knowledge, Theory of (Islam)4
- Language and languages--Style4
- Masjid al-Aqṣá (Jerusalem)4
- Mullā Ḥanafī, Muḥammad. Risālah al-Ḥanafīyah4