- Jāmī, 1414-1492. Muʻammayāt asmāʾ al-ḥusná1
- Jāmī, 1414-1492. Poems1
- Jārbardī, Fakhr al-Dīn Aḥmad ibn al-Ḥasan, -1345. Mughnī fī al-naḥw1
- Jārbardī, Fakhr al-Dīn Aḥmad ibn al-Ḥasan, -1345. Mughnī fī ʻilm al-naḥw1
- Kamāl al-Dīn Muḥammad ibn Muḥammad, -1418. Naẓm Nukhbat al-fikar fī muṣṭalaḥ ahl al-athar1
- Kamāl al-Dīn al-Bakrī, Muḥammad ibn Muṣṭafá, 1730 or 1731-1781 or 1782. Fatḥ al-ilāh fī madḥ Rasūl Allāh1
- Kapitalbünde1
- Karaites (Jewish law)1
- Kaydānī. Maṭālib al-muṣallī1
- Kemalpaşazade, 1468 or 1469-1534. Risālah fī al-haykal al-insānī1
- Keśavācārya Daivajña, active 16th century. Jātakapaddhati1
- Khalwatīyah1
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Tārīkh Baghdād1
- Khilāṭī, Muḥammad ibn ʻAbbād, -1254. Talkhīṣ al-Jāmiʻ al-kabīr1
- Khiṭāʼī, ʻUthmān, active 15th century. Ḥāshiyah ʻalá al-Mukhtaṣar1
- Khānaqāh-i Niʻmat Allāhī1
- Kingdom of God1
- Kings and rulers--Heraldry1
- Kings and rulers--Religious aspects1
- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1