- Italy--Trieste4
- Italy--Tuscany4
- Iṣfahānī, Maḥmūd ibn ʻAbd al-Raḥmān, 1275 or 1276-1348 or 1349. Tashyīd al-Qawāʻid4
- James, the Greater, Saint4
- Jerome, Saint, -419 or 4204
- Jewish philosophy4
- Jewish sermons, Hebrew4
- Judeo-Arabic literature4
- Jāmiʻ al-Azhar4
- Karma4
- Kinship (Islamic law)4
- Knights of Malta4
- Knowledge, Theory of (Islam)4
- Kāfī (Kulaynī, Muḥammad ibn Yaʻqūb)4
- Lakṣmaṇa (Hindu deity)4
- Landlord and tenant4
- Language and languages--Philosophy4
- Latin America4
- Latin poetry, Medieval and modern4
- Legal instruments (Jewish law)4