Author
- John Versor1
- John Wycliffe1
- John Zonaras1
- John of Lancaster, 1st Duke of Bedford1
- John of Saxony1
- John of Wales1
- Jörg Muelich1
- Kingdom of France1
- Klaus von Stille1
- Konrad III. von Soltau1
- Laurent d'Orleans1
- Leo III1
- Lodovico della Torre1
- Lope de Espejo1
- Lope de Olmedo1
- Louis IV of Bavaria1
- Lucan1
- Lucian of Samosata1
- Lucius Annaeus Florus1
- Lucius Fenestella1