- Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf, 1250-1325. Mabādiʼ al-wuṣūl ilá ʻilm al-uṣūl1
- Intention--Religious aspects--Islam1
- Interpersonal relations--Religious aspects--Islam1
- Iran1
- Iran--Dāmghān1
- Iran--Iṣfahān1
- Iran--Mashhad1
- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1
- Islam--Rituals1
- Islamic countries1
- Islamic education1
- Islamic eschatology1
- Islamic philosophy1
- Islamic poetry, Arabic1
- Islamic sermons, Arabic1
- Jaʻbarī, Arslān ibn Yaʻqūb, -1300. Risālat al-tawḥīd1
- Judges (Islamic law)1
- Judicial power (Islamic law)1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Mukhtaṣar al-Muntahá1
- Kinship (Islamic law)1