- Khiḍr (Legendary character)1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Khwājahʹzādah, Muṣṭafá ibn Yūsuf, -1487 or 14881
- Khānaqāh-i Niʻmat Allāhī1
- Kings and rulers--Genealogy1
- Kings and rulers--Heraldry1
- Kirchmair, Georg, 1481-15541
- Knowledge, Theory of1
- Kārtavīryārjuna (Hindu deity)1
- Kāshī, Yaḥyá ibn Aḥmad. Qarah ḥāshiyah1
- Kātī, Ḥusām al-Dīn al-Ḥasan, -1358 or 1359. Qāla aqūl1
- Ladino language1
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)1
- Lamoignon de Basville, M. de (Nicolas), 1648-17241
- Land titles--Registration and transfer1
- Lang, Matthäus, 1468-15401
- Language and languages1
- Language and languages--Philosophy1
- Languages, Secret1
- Latin drama (Comedy)1