Author
- John de Beauchesne1
- Josef ibn Tabul1
- Joseph ben Abraham Gikatilla1
- Joshua ibn Shuaib1
- José Pellicer1
- Juan Alvarez1
- Juan López Ossorio1
- Juan Ortiz Campoy1
- Juan Valenzuela Velázquez1
- Juan de Mongaston1
- Judah Rosanes1
- Jāwushzādah, Ibrāhīm ibn Muḥammad, d. 1640 or 11
- Kalidasa1
- Kalim Kashani1
- Kalonymus ben Kalonymus1
- Kamal al-Din ibn al-Humam1
- Kanada1
- Karakaşzade Ömer1
- Kefeli Ḥüseyin1
- Keśavasvāmin1