Author
- Joan Martines1
- Joanna of Austria, Princess of Portugal1
- Johann Neudörffer the Elder1
- Johannes Lemp1
- Johannes Mellarinus1
- Johannes Schöner1
- John Crosse1
- John Harington1
- John de Beauchesne1
- John of Ibelin1
- Josef ibn Tabul1
- Joseph Nasi1
- João Freire1
- João Gomes da Silva1
- Juan Baptista de Gatica1
- Juan Gallo1
- Juan Perez Barahona1
- Juan de Foxá1
- Juan de Zumárraga1
- Judah Hadassi1