Author
- Isabella I of Castile1
- Ismāʻīl Jarrāḥī1
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī1
- Jacob ben Asher1
- Jacob ben David ben Yom Tov1
- Jacob ibn Habib1
- Jacobus Dinetus1
- Jakob Christoph Blarer von Wartensee1
- Jean Bayard1
- Jean Passerat1
- Jerónimo Román y Zamora1
- Joachim Bendel1
- Johannes Mellarinus1
- Johannes Schöner1
- Johannes Tostius1
- John Bale1
- John Cornelius1
- John Frederick II of Saxony1
- John of Ibelin1
- John Dokeianos1