- Justice, Administration of1
- János I Zápolya, King of Hungary, 1487-15401
- Jābir ibn Ḥayyān1
- Jāmī, 1414-1492. Tafsīr al-fātiḥah al-sharīfah1
- 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
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Jīlī, ʻAbd al-Karīm ibn Ibrāhīm, 1365 or 1366- Risālat al-Tawḥīd1
- Kalbī, Diḥyah ibn Khalīfah, -approximately 6701
- Karaite calendar1
- Karaite law1
- Karaites (Jewish law)1
- Karaites--Liturgy1
- Karmī, Marʻī ibn Yūsuf, -1623 or 16241
- Karshuni1
- Kashmir Śaivism1
- Kaydānī. Maṭālib al-muṣallī1
- Kaʻbah (Mecca, Saudi Arabia)1
- Kemalpaşazade, 1468 or 1469-15341
- Kemalpaşazade, 1468 or 1469-1534. Risālah fī al-haykal al-insānī1