- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Risālat al-Tawḥīd1
- Kabāʼir (Muḥammad ibn ʻAbd al-Wahhāb)1
- Kapitalbünde1
- Karmī, Marʻī ibn Yūsuf, -1623 or 16241
- Kaʻbah (Mecca, Saudi Arabia)1
- Kemalpaşazade, 1468 or 1469-15341
- Kemalpaşazade, 1468 or 1469-1534. Iṣlāḥ wa-al-īḍāḥ1
- Khalwatīyah1
- Khānaqāh-i Niʻmat Allāhī1
- Kings and rulers--Religious aspects1
- Kinship (Islamic law)1
- Knowledge, Theory of (Islam)1
- Laughter--Religious aspects--Islam1
- Letter writing, Turkish1
- Lettering pieces1
- Libel and slander--Religious aspects--Islam1
- Literary style1
- Literature1
- Logic, Medieval1