- Gulistān (Saʻdī)4
- Hair--Religious aspects--Islam4
- Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf, 1250-1325. Tahdhīb al-wuṣūl ilá ʻilm al-uṣūl4
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb4
- Ijtihād (Islamic law)4
- India4
- Intention--Religious aspects--Islam4
- Iran--Tabrīz4
- Iraq--Baghdad4
- Islam and philosophy4
- Islamic astrology4
- Islamic heresies4
- Islamic occultism4
- Israel--Acre4
- Israel--Tsefat4
- Istiṣḥāb (Islamic law)4
- Iḥyāʼ ʻulūm al-dīn (Ghazzālī)4
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Mukhtaṣar al-Muntahá4
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Shamsīyah4
- Kanz al-daqāʼiq (Nasafī, ʻAbd Allāh ibn Aḥmad)4