- Khayālī, Aḥmad ibn Mūsá, -1457? Ḥāshiyah ʻalá sharḥ al-Taftāzānī1
- 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
- Kāshī, Yaḥyá ibn Aḥmad. Qarah ḥāshiyah1
- Kātī, Ḥusām al-Dīn al-Ḥasan, -1358 or 1359. Qāla aqūl1
- Language and languages--Philosophy1
- Languages, Secret1
- Laylat al-Qadr1
- Leather bindings1
- Lebanon--Tripoli1
- Legacies (Islamic law)1
- Letter writing, Arabic1
- Letter writing, Persian1
- Liquor laws (Islamic law)1
- Liturgics1
- Lumʻah al-Dimashqīyah (Shahīd al-Awwal, Muḥammad ibn Makkī)1
- Mamelukes1
- Manuscript fragments1