- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Shamsīyah1
- Justinian I, Emperor of the East, 483?-5651
- Jāmiʻ al-Azhar1
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Tārīkh Baghdād1
- Kings and rulers1
- Kings and rulers--Duties1
- Kings and rulers--Succession1
- Knights and knighthood1
- Kufic1
- Lancelot (Prose romance)1
- Land titles1
- Land titles--Registration and transfer1
- Lanvers, Hamo1
- Lapidaries (Medieval literature)1
- Lathom, Robert de, 13th century1
- Latin language--Dictionaries1
- Latin language--Etymology1
- Latin literature, Medieval and modern1
- Laudatory poetry, Hebrew1
- Law commentaries1