Author
- Joshua Benzion Segre2
- Judah Leib Pukhovitser2
- Judah Rosanes2
- Judah ben Saul ibn Tibbon2
- Julian of Toledo2
- Julianus Pomerius2
- Justin2
- Jérôme Lalande2
- Kalonymus ben Kalonymus2
- Kamalakara2
- Kapila2
- Karim Khan Kermani2
- Keśavamiśra2
- Khalīfah Shāh Muḥammad Kanawjī2
- Khalīl ibn Isḥāq al-Jundī2
- Khalīl ibn Rasūl Sīnūbī2
- Khvājah Muḥammad Pārsā2
- Konrad von Brundelsheim2
- Kātyāyana2
- Kāśīnātha Bhaṭṭa Bhaḍa2