Author
- Jean Marot1
- Jean Passerat1
- Joannes Dominicus de Marchis1
- Johannes Cnipius1
- Johannes Mellarinus1
- Johannes Schöner1
- Johannes Tostius1
- John Cornelius1
- John Eyr1
- John Frederick II of Saxony1
- John of Ibelin1
- John Dokeianos1
- Joseph Trani1
- Judah Halevi1
- Keśavamiśra1
- Kingdom of Bohemia1
- Leonardo Loredan1
- Leonhard Freisleben1
- Lorenzo Giacomini1
- Lorenzo Gondi1