- Judgment Day3
- Julius III, Pope, 1487-15553
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Sharḥ khuṭbah al-Quṭbīyah3
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Lawāmiʻ al-asrār3
- Karaites (Jewish law)3
- Kaydānī. Fiqh al-Kaydānī3
- Khabbāzī, ʻUmar ibn Muḥammad, 1231 or 2-1292. Mughnī fī uṣūl al-fiqh3
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)3
- Khiḍr (Legendary character)3
- Kings and rulers--Succession3
- Kinship (Islamic law)3
- Kirātārjunīya (Bhāravi)3
- Kitāb (Sībawayh, ʻAmr ibn ʻUthmān)3
- Knowledge, Theory of3
- Knowledge, Theory of (Islam)3
- Korea3
- Ladino language3
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)3
- Land tenure--Law and legislation3
- Land titles3