Author
- Izz al-Din ibn 'Abd al-Salam1
- Jacob Berab1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jean-François Roussin1
- Joannes Oliva1
- John Skyrrow1
- Josef ibn Tabul1
- Joseph ben Abraham Gikatilla1
- Joseph ben Gorion1
- Joshua ben Israel Benveniste1
- Joshua ibn Shuaib1
- Juan Ortiz Campoy1
- Juana I of Castile1
- Judah Rosanes1
- Judah ben Saul ibn Tibbon1
- Jāwushzādah, Ibrāhīm ibn Muḥammad, d. 1640 or 11
- Kalim Kashani1
- Kalonymus ben Kalonymus1
- Kamal al-Din ibn al-Humam1
- Kaḥḥāl, ʻAlī ibn ʻĪsá, -1038 or 10391