Author
- Judah Leib Ben Zeev1
- Judah Leib Prossnitz1
- Judah Leib Pukhovitser2
- Judah Rosanes2
- Judah ben Saul ibn Tibbon3
- Julian of Toledo2
- Julianus Pomerius2
- Julius II2
- Julius III1
- Jullien Gervais1
- Junayd ibn Sandal Baghdādī1
- Justin2
- Justinian I22
- Juvenal8
- Jérôme Lalande2
- Jñānamṛtapata1
- Jñānendrasarasvatī15
- Jörg Muelich1
- Jānakīnātha Bhaṭṭācārya7
- Jāwushzādah, Ibrāhīm ibn Muḥammad, d. 1640 or 11