Author
- Jean Gerson2
- Jean de Meun2
- John Burgh2
- John Felton2
- John Gower2
- John Montgomery2
- John of Wales2
- Jordan von Quedlinburg2
- Julianus Pomerius2
- Julius II2
- Justin2
- Jérôme Lalande2
- Kamal Khujandi2
- Kamalākara Bhaṭṭa2
- Kamalākarabhaṭṭa2
- Keçecizade İzzet Molla2
- Keśavācārya2
- Khalīfah Shāh Muḥammad Kanawjī2
- Khwaja Abdullah Ansari2
- Kingdom of France2