Author
- Joannes Oliva1
- Joannes de Crivelli1
- Johann Neudörffer the Elder1
- Johannes Agricola1
- Johannes Gherinx1
- Johannes Hymmonides1
- Johannes Nider1
- Johannes ab Indagine1
- Johannes von Freiburg1
- John Chrysostom1
- John Gower1
- John Scottowe1
- John XXII1
- John de Beauchesne1
- John de Mowbray, 2nd Baron Mowbray1
- John of Howden1
- José Antonio de Alzate y Ramírez1
- José Romero de Tejada y Artacho1
- Juan Alvarez1
- Juan Antonio de Hozes Sarmiento1