Author
- Jacques de Vitry1
- Jaghmini1
- Jakob Christoph Blarer von Wartensee1
- Jalaluddin al-Mahalli1
- Jean Marot1
- Jean de Wavrin1
- Jerome1
- Jerónimo de Vivar1
- Jewish Community of Amsterdam, Netherlands1
- Joanna I of Naples1
- Joannes Dominicus de Marchis1
- Johanna Hawkeslowe (Sr.)1
- Johannes Tostius1
- Johannes von Kastl1
- John Cleseby1
- John Eyr1
- John Frederick II of Saxony1
- John Gower1
- John Tiptoft, 1st Earl of Worcester1
- John of Glastonbury1