- Isra' and Mi`raj of the Prophet Muhammad1
- Iʻrāb ʻan qawāʻid al-iʻrāb (Ibn Hishām, ʻAbd Allāh ibn Yūsuf)1
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tasdīd al-ʻaqāʾid fī sharḥ Tajrīd al-qawāʻid1
- Jinn1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-14131
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá sharḥ Tajrīd al-iʻtiqād1
- Jāmī, 1414-1492. Risālah-i muʻammā1
- Kaʻbah (Mecca, Saudi Arabia)1
- Kemalpaşazade, 1468 or 1469-15341
- Kemalpaşazade, 1468 or 1469-1534. Īḍāḥ al-iṣlāḥ1
- Khalwatīyah1
- Khayālī, Aḥmad ibn Mūsá, -1457? Ḥāshiyah ʻalá sharḥ al-Taftāzānī1
- Khiḍr (Legendary character)1
- Knowledge, Theory of (Islam)1
- Kūrānī, Ibrāhīm ibn Ḥasan, 1616 or 1617-approximately 1690. Maslak al-taʻrīf1
- Legends1
- Liquor laws (Islamic law)1
- Longevity--Religious aspects--Islam1
- Love--Philosophy1
- Magic squares1