Author
- Ibn ʻAbd al-Riḍá1
- Idris Bitlisi1
- Inayat Khan1
- Ippolito Libri1
- Jacob Saphir1
- Jacobus de Cessolis1
- Jacopone da Todi1
- Jacques de Vitry1
- Jaghmini1
- Jalal Al-Din Al-Khabazi1
- Jalal al-Din Davani1
- Jalaluddin al-Mahalli1
- Jean Froissart1
- Jean Marot1
- Jean de Wavrin1
- Jerónimo Román y Zamora1
- Jewish Community of Amsterdam, Netherlands1
- Jewish Community of Padua, Italy1
- Joannes de Crivelli1
- Johannes de Thurocz1