- Interpersonal relations--Religious aspects--Islam1
- Iran--Ardabīl1
- Iran--Dāmghān1
- Iran--Qazvīn1
- Iran--Shīrāz1
- Ishārāt wa-al-tanbīhāt (Avicenna)1
- Islam--Theology1
- Islamic calendar1
- Islamic chronology1
- Islamic eschatology1
- Islamic legends1
- Islamic occultism1
- Islamic sermons, Arabic1
- Islamic sermons, Persian1
- Isra' and Mi`raj of the Prophet Muhammad1
- Izmīrī, Muṣṭafá ibn Rajab, active 17th century1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʼid fī sharḥ Tajrīd al-qawāʻid1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʾid fī sharḥ Tajrīd al-qawāʻid1
- Jaʻbarī, Arslān ibn Yaʻqūb, -1300. Risālat al-tawḥīd1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Miṣbāḥ fī sharḥ al-Miftāḥ1