- Ketubah1
- Khabbāzī, ʻUmar ibn Muḥammad, 1231 or 1232-1292. Mughnī fī uṣūl al-fiqh1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khamti language1
- Khaṭīb al-Baghdādī, Abū Bakr Aḥmad ibn ʻAlī, 1002-1071. Asmāʼ al-mubhamah fī al-anbāʼ al-muḥkamah1
- Kings and rulers50
- Kings and rulers--Duties1
- Kings and rulers--Genealogy2
- Kings and rulers--Heraldry1
- Kings and rulers--Religious aspects1
- Kings and rulers--Succession1
- Kirchmair, Georg, 1481-15541
- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1
- Knights of Malta3
- Knowledge, Theory of (Islam)3
- Kyi︠e︡vo-Pechersʹka lavra1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)8
- Lacquered bindings2
- Ladron de Guevara family1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611