Author
- John Dennis1
- John Fortescue1
- John Frederick II of Saxony1
- John Halgren of Abbeville1
- John II of Castile1
- John Lydgate1
- John Sergeant1
- John Versor1
- John Wycliffe1
- John XXI1
- John Zonaras1
- John of Garland1
- John of Ibelin1
- John of Seville ?1
- John Dokeianos1
- Jonathan Eybeschutz1
- Joseph Haslewood1
- Joseph Nasi1
- Joseph ben Moses Sarfati1
- Josephus1