Author
- John Cleseby1
- John Gower1
- John Tiptoft, 1st Earl of Worcester1
- John of Glastonbury1
- John of Lancaster, 1st Duke of Bedford1
- John, Duke of Berry1
- Josephus1
- Juana I of Castile1
- Jörg Muelich1
- Khālid ibn ʻAbd Allāh al-Azharī1
- Kingdom of Naples1
- Lorenzo de' Medici1
- Louis XII of France1
- Ludovico Foscarini1
- Luis Velasco1
- Mahmud ibn Abd al-Rahman al-Isfahani1
- Malavolti family1
- Matteo Palmieri1
- Matthew Paris1
- Maḥmūd Ibn-Aḥmad Ibn-Ḫaṭīb ad-Dahša1