- Italy--Verona2
- Italy--Vicenza2
- Italy--Volterra2
- Jainism2
- Japan2
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah2
- Jewish folk literature2
- Jewish interpretations of Jesus Christ2
- Jewish poetry2
- Jewish sermons, Hebrew2
- Jews--Legal status, laws, etc.2
- Jinn2
- Jāmiʻ al-Azhar2
- Kanz al-daqāʼiq (Nasafī, ʻAbd Allāh ibn Aḥmad)2
- Karaite law2
- Karaites--Liturgy2
- Khawwāṣ, Aḥmad ibn ʻAbbād, 1378?-1454. Kāfī fī ʻilmay al-ʻarūḍ wa-al-qawāfī2
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Asmāʼ al-mubhamah fī al-anbāʼ al-muḥkamah2
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)2
- Kings and rulers--Religious aspects2