- Ibn Malak, ʻAbd al-Laṭīf ibn ʻAbd al-ʻAzīz. Sharḥ Manār al-anwār fī uṣūl al-fiqh1
- Ibn Wadʻān, Muḥammad ibn ʻAlī, d. 1101. Arbaʻīn al-Wadʻānīyah1
- Ibn al-Murtaḍá, Aḥmad ibn Yaḥyá, 1363-1437. Miʻyār al-ʻuqūl fī ʻilm al-uṣūl1
- Ibn al-Nāẓim, Muḥammad ibn Muḥammad, d. 1287 or 8. Sharḥ al-Alfīyah1
- Ibn al-Uqlīshī, Aḥmad ibn Maʻadd, -1155 or 11561
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Tahdhīb al-Tahdhīb.--Abridgment1
- Ibrāhīm ibn Adʹham, -approximately 7771
- Idra zuta1
- Ijtihād (Islamic law)1
- Illumination of books and manuscripts, Indic1
- Incantations, Hebrew1
- India--Delhi1
- India--Hyderabad1
- India--Mughal Empire1
- India--Surat1
- Interest (Jewish law)1
- International relations1
- Iran--Ardabīl1
- Iran--Dāmghān1
- Iran--Khurāsān1