Author
- Juan de Mongaston1
- Juan de Torquemada1
- Juan de Zumárraga1
- Judah Hadassi1
- Judah Leib Ben Zeev1
- Judah Leib Prossnitz1
- Julius III1
- Jullien Gervais1
- Junayd ibn Sandal Baghdādī1
- Jñānamṛtapata1
- Jörg Muelich1
- Jāwushzādah, Ibrāhīm ibn Muḥammad, d. 1640 or 11
- Ka'b bin Zuhayr1
- Kabbāshī, Aḥmad1
- Kalb Ḥusayn ibn Faz̤l ʻAlī Tabrīzī1
- Kalim Kashani1
- Kalyanamalla1
- Kalāʼī, Muḥammad ibn Sharaf, d. 13751
- Kamal ad-Din Bina'i1
- Kamal al-Din al-Ghazzi1