Author
- Jean Gerson1
- Jean de Roquetaillade1
- Jean de Wavrin1
- Johann Herolt1
- Johannes Milis1
- Johannes de Sacrobosco1
- John Chrysostom1
- John of Seville ?1
- Jordan von Quedlinburg1
- Juana I of Castile1
- Kamal al-Din ibn al-Humam1
- Khvājah Muḥammad Pārsā1
- Leo I1
- Lorenzo de' Medici1
- Luca Pacioli1
- Luigi de' Medici1
- Mahmud ibn Ali al-Qashani1
- Majd ad-Dīn Ibn Athir1
- Manyas Oǧlu1
- Manṣūr Ibn-Muḥammad Ibn-Aḥmad1