Author
- John Wycliffe1
- John XXI1
- John XXII1
- John Zonaras1
- John de Beauchesne1
- John de Breton1
- John de Seccheville1
- John of Damascus1
- John of Garland1
- John of Genoa1
- John of Ibelin1
- John of Lancaster, 1st Duke of Bedford1
- John of Saxony1
- John of Seville1
- John Dokeianos1
- John, Duke of Berry1
- Jonathan Eybeschutz1
- Joseph Haslewood1
- Joseph ben Abraham Gikatilla1
- Joseph ben Moses Sarfati1