Author
- Jayakr̥ṣṇa3
- Jean Gerson3
- Jewish Community of Carpentras, France3
- Johannes de Sacrobosco3
- John Gower3
- Joseph ben Abraham Gikatilla3
- Josephus3
- Juvenal3
- Kamalakara3
- Kamāl al-Dīn Turkumānī3
- Kapila3
- Keśavamiśra3
- Khayr al-Din al-Ramli3
- Khālid ibn ʻAbd Allāh al-Azharī3
- Kingdom of England3
- Kulaynī, Muḥammad ibn Yaʻqūb, -941?3
- Lakṣmīdhara3
- Laugākṣi Bhāskara3
- Leo Archpriest3
- Leo X3