- Khadījah, -approximately 6191
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khiḍr (Legendary character)1
- Khulāṣat al-ḥisāb (ʻĀmilī, Bahāʼ al-Dīn Muḥammad ibn Ḥusayn)1
- Kinship (Islamic law)1
- Knowledge, Theory of (Islam)1
- Kātī, Ḥusām al-Dīn al-Ḥasan, -1358 or 1359. Qāla aqūl1
- Language and languages--Philosophy1
- Laughter--Religious aspects--Islam1
- Laylat al-Qadr1
- Learning1
- Legal forms1
- Legends1
- Liquor laws (Islamic law)1
- Literary style1
- Love--Philosophy1
- Lumʻah al-Dimashqīyah (Shahīd al-Awwal, Muḥammad ibn Makkī)1
- Manār al-anwār fī al-uṣūl (Nasafī, ʻAbd Allāh ibn Aḥmad)1
- Maqdisī, ʻAlī ibn Ghānim, 1514-1596. Nūr al-shamʻah1
- Martyrdom--Islam1