Author
- Joannes Thomas Beltamino1
- Joham de Vernoils1
- Johann Hertzhaimer1
- Johannes Cnipius1
- Johannes Lichtenberger1
- Johannes Mellarinus1
- Johannes Schöner1
- Johannes Tostius1
- Johannes de Sacrobosco1
- John Cornelius1
- John Eyr1
- John Felton1
- John Frederick II of Saxony1
- John II of Castile1
- John Montgomery1
- John XXI1
- John de Beauchesne1
- John of Ibelin1
- John of Lancaster, 1st Duke of Bedford1
- John Dokeianos1