Author
- John Lydgate1
- John Sergeant1
- John Versor1
- John Wycliffe1
- John XXI1
- John Zonaras1
- John of Garland1
- John of Seville ?1
- John Dokeianos1
- Jonathan Eybeschutz1
- Joseph Haslewood1
- Joseph Nasi1
- Joseph ben Gorion1
- Joseph ben Moses Sarfati1
- Joshua ben Israel Benveniste1
- Joshua ibn Shuaib1
- José Pellicer1
- Juan López Ossorio1
- Juan Martínez Silíceo1
- Juan Páez de Castro1