- Khwājahʹzādah, Muṣṭafá ibn Yūsuf, -1487 or 14881
- Khādimī, Muḥammad ibn Muṣṭafá, 1701 or 1702-1762 or 1763. Risālah fī ajzāʼ al-qaḍīyah1
- Khādimī, Muḥammad ibn Muṣṭafá, 1701 or 2-1762 or 3. Risālah fī ajzāʼ al-qaḍīyah1
- Khānaqāh-i Niʻmat Allāhī1
- Kings and rulers--Genealogy1
- Kings and rulers--Heraldry1
- Kinot1
- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1
- Kitāb (Sībawayh, ʻAmr ibn ʻUthmān)1
- Kufic1
- Kurds1
- Kāfī al-mubtadiʼ min al-ṭullāb (Ibn Balabān, Muḥammad ibn Badr al-Dīn)1
- Kāfī fī al-ʻarūḍ wa-al-qawāfī (Tibrīzī, Yaḥyá ibn ʻAlī)1
- Kālī (Hindu deity)1
- Kāshī, Yaḥyá ibn Aḥmad. Qarah ḥāshiyah1
- Kāsānī, Aḥmad Khvājagī1
- Kātī, Ḥusām al-Dīn al-Ḥasan, -1358 or 1359. Qāla aqūl1
- Ladino language1
- Ladino literature1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611