- Kumayl ibn Ziyād, 633 or 634-7011
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)2
- Lamaʻāt (ʻIrāqī, Fakhr al-Dīn Ibrāhīm)2
- Language and languages--Philosophy2
- Language and languages--Style1
- Legacies (Islamic law)2
- Liquor laws (Islamic law)1
- Logic16
- Love--Philosophy1
- Magic squares1
- Mahdi1
- Malikites1
- Manuscripts, Arabic82
- Manuscripts, Persian10
- Manuscripts, Turkish12
- Manāzil al-sāʼirīn (Anṣārī al-Harawī, ʻAbd Allāh ibn Muḥammad)2
- Maqṣūrah (Ibn Durayd, Muḥammad ibn al-Ḥasan)1
- Martyrdom--Islam2
- Mas̲navī (Jalāl al-Dīn Rūmī, Maulana)1
- Mathematics, Arab2