Author
- John Gower1
- John of Genoa1
- John of Glastonbury1
- John of Howden1
- John of Saxony1
- John of Wales1
- Juana I of Castile1
- Kingdom of England1
- Lactantius1
- Leo III1
- Leontios of Neapolis1
- Lydgate, John, 1370?-1451?1
- Marbodius of Rennes1
- Marcantonio Aldegati1
- Marcus Manilius1
- Martial1
- Martin V1
- Maurice de Sully1
- Naldo Naldi1
- Oglerio di Lucedio1