- Hair--Religious aspects--Islam4
- History, Military4
- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh4
- Ibn Malak, ʻAbd al-Laṭīf ibn ʻAbd al-ʻAzīz. Sharḥ Manār al-anwār fī uṣūl al-fiqh4
- Ibn Wahbān, ʻAbd al-Wahhāb ibn Aḥmad, d. 1366 or 7. Qayd al-sharāʼid4
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjiz al-Qānūn4
- Ibn al-Sāʻātī, Aḥmad ibn ʻAlī, 1254-1294 or 5. Majmaʻ al-baḥrayn wa-multaqá al-nayyirayn4
- Ijtihād (Islamic law)4
- Indonesia--Java4
- Inscriptions, Arabic4
- Intention--Religious aspects--Islam4
- Interest (Islamic law)4
- Iran--Tabrīz4
- Iraq--Baghdad4
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 1285. Ḍawʼ ʻalá al-Miṣbāḥ4
- Islam and philosophy4
- Islamic astrology4
- Islamic heresies4
- Islamic illumination of books and manuscripts4
- Islamic interpretations of sacred works4