Author
- John Speidell1
- John Tiptoft, 1st Earl of Worcester1
- John Versor1
- John Wycliffe1
- John XXI1
- John de Beauchesne1
- John de Breton1
- John de Seccheville1
- John of Damascus1
- John of Genoa1
- John of Howden1
- John of Saxony1
- John of Seville1
- João Freire1
- João Gomes da Silva1
- Juan Gallo1
- Juan Luis Vives1
- Juan Martínez Silíceo1
- Juan Valenzuela Velázquez1
- Juan de Mena1