Author
- Juan de Foxá1
- Juan de Garnica1
- Juan de Torquemada1
- Judah Hadassi1
- Judah Leib Prossnitz1
- Julian of Toledo1
- Julius II1
- Jullien Gervais1
- Junayd ibn Sandal Baghdādī1
- Justinian I1
- Jörg Muelich1
- Jāwushzādah, Ibrāhīm ibn Muḥammad, d. 1640 or 11
- Ka'b bin Zuhayr1
- Kalāʼī, Muḥammad ibn Sharaf, d. 13751
- Kamal al-Din al-Ghazzi1
- Kamalākara Bhaṭṭa1
- Kamāl al-Dīn ibn Āsāyish Shirwānī1
- Kamāl aldaayn albakry1
- Kanada1
- Kanjāwī, Jibrīl ibn ḥasan, 1351 or 21