Author
- John Burgh2
- John Felton2
- John Montgomery2
- John XXII2
- John de Beauchesne2
- Jordan von Quedlinburg2
- Julian of Toledo2
- Julianus Pomerius2
- Julius II2
- Justin2
- Jérôme Lalande2
- Kamal Khujandi2
- Kamalākara Bhaṭṭa2
- Kamalākarabhaṭṭa2
- Keçecizade İzzet Molla2
- Keśavācārya2
- Khalīfah Shāh Muḥammad Kanawjī2
- Khalīl ibn Rasūl Sīnūbī2
- Khwaja Abdullah Ansari2
- Kingdom of France2