Author
- John Chrysostom1
- John Gower1
- John Mandeville1
- John XXII1
- John of Seville ?1
- John, Duke of Berry1
- Jordan von Quedlinburg1
- Juana I of Castile1
- Judah ben Saul ibn Tibbon1
- Junayd ibn Sandal Baghdādī1
- Kingdom of Naples1
- Leo I1
- Leon Battista Alberti1
- Lorenzo de' Medici1
- Louis XII of France1
- Luca Pacioli1
- Luigi de' Medici1
- Mahmud ibn Abd al-Rahman al-Isfahani1
- Malavolti family1
- Manyas Oǧlu1