- Jiménez de Cisneros, Francisco, 1436?-15171
- John II, King of Aragon, 1397-14791
- Judges (Islamic law)1
- Jumʻah1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-14131
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Mukhtaṣar al-Muntahá1
- Jāmiʻ al-ṣaḥīḥ (Bukhārī, Muḥammad ibn Ismāʻīl)1
- Jāmī, 1414-14921
- Kalbī, Diḥyah ibn Khalīfah, -approximately 6701
- Kamāl al-Dīn Muḥammad ibn Muḥammad, -1418. Naẓm Nukhbat al-fikar fī muṣṭalaḥ ahl al-athar1
- Karmī, Marʻī ibn Yūsuf, -1623 or 16241
- Kashshāf (Zamakhsharī, Maḥmūd ibn ʻUmar)1
- Kemalpaşazade, 1468 or 1469-1534. Risālah fī al-haykal al-insānī1
- Khamrīyah (Ibn al-Fāriḍ, ʻUmar ibn ʻAlī)1
- Khiḍr (Legendary character)1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)1
- Ladino literature1
- Ladino poetry1
- Language and languages--Philosophy1
- Latin poetry1