Author
- John Herd1
- John de Beauchesne1
- John of Glastonbury1
- John of Wales1
- Josephus1
- João Freire1
- João Gomes da Silva1
- Juan Gallo1
- Juan Valenzuela Velázquez1
- Juan de Mena1
- Juan de Torquemada1
- Juana I of Castile1
- Julius III1
- Kingdom of Bohemia1
- Kingdom of England1
- Kingdom of Naples1
- Lambertus, Paulus1
- Leonardo Loredan1
- Lodovico della Torre1
- Lope de Espejo1