Author
- Johannes Schöner1
- Johannes Tostius1
- Johannes von Kastl1
- John Burgh1
- John Cornelius1
- John Eyr1
- John Felton1
- John Frederick II of Saxony1
- John II of Castile1
- John XXI1
- John of Ibelin1
- John of Lancaster, 1st Duke of Bedford1
- John Dokeianos1
- John, Duke of Berry1
- Joseph Albaradani1
- Joseph Trani1
- Joseph ben Ephraim Karo1
- Joseph ben Moses Sarfati1
- Joseph ibn Abitur1
- Joseph ibn Migash1