- Inheritance and succession (Islamic law)1
- Intellect--Religious aspects--Islam1
- Intention--Religious aspects--Islam1
- Interfaith relations1
- Iran--Rasht1
- Islamic Empire1
- Islamic etiquette1
- Islamic law--Interpretation and construction1
- Islamic magic1
- Islamic sermons, Arabic1
- Jaʻbarī, Arslān ibn Yaʻqūb, -1300. Risālat al-tawḥīd1
- Judaism1
- Jāmī, 1414-14921
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Risālat al-Tawḥīd1
- Khiḍr (Legendary character)1
- Khūjahʹzādah, ʻAbd al-Naṣīr ibn ʻAbd Allāh, active 16th century. Taḥrīrāt ʻalá al-Ṭarīqah al-Muḥammadīyah1
- Knowledge, Theory of (Islam)1
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)1
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