Author
- Jean Gerson3
- Jean de Meun3
- Johann Neudörffer the Younger3
- John Cassian3
- John of Wales3
- Joshua Benzion Segre3
- Judah ben Saul ibn Tibbon3
- Kamalakara3
- Kamāl al-Dīn Turkumānī3
- Kapila3
- Keśavamiśra3
- Khvājah Muḥammad Pārsā3
- Kingdom of England3
- Kınalızâde Hasan Çelebi3
- Lakṣmīdhara3
- Laugākṣi Bhāskara3
- Leo Archpriest3
- Leo I3
- Lucian of Samosata3
- Maffeo Vegio3