- Ibn Nawbakht, Ibrāhīm, active 10th century. Yāqūt fī ʻilm al-kalām1
- Ibn Sharaf Shāh, Ḥasan ibn Muḥammad, 1247 or 1248-1315 or 1316. Wāfīyah fī sharḥ al-Kāfīyah1
- Ilāhʹābādī, Muḥibb Allāh. Taswīyah1
- Imams (Shiites)1
- India1
- Intellect--Religious aspects--Islam1
- Iraq1
- Ishārāt wa-al-tanbīhāt (Avicenna)1
- Islam and philosophy1
- Islam--Theology1
- Islamic cosmology1
- Islamic eschatology1
- Islamic etiquette1
- Islamic heresies1
- Islamic law1
- Islamic learning and scholarship1
- Islamic magic1
- Islamic sermons, Arabic1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-14131
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Shamsīyah1