Author
- John of Lancaster, 1st Duke of Bedford1
- John Dokeianos1
- John, Duke of Berry1
- Joseph ben Moses Sarfati1
- Josephus1
- Juan de Torquemada1
- Juana I of Castile1
- Jullien Gervais1
- Kingdom of Bohemia1
- Kingdom of England1
- Kingdom of Naples1
- Konrad III. von Soltau1
- Laurentius Cynthius1
- Leonardo Loredan1
- Leonhard Freisleben1
- Lope de Vega1
- Lorenzo Giacomini1
- Lorenzo Gondi1
- Lorenzo Pucci1
- Lorenzo Spirito Gualtieri1