Author
- Ibrahim Efendi1
- Ibrāhīm al-Ḥalabī1
- Ibrāhīm al-Ḥusaynī1
- Imbert Feutrier1
- Imām al-Dīn ibn Luṭf Allāh Lāhūrī1
- Isaac Israeli ben Joseph1
- Ismail ibn Hammad al-Jawhari1
- Jacobus Dinetus1
- Jacobus de Voragine1
- Jacopo Ragone1
- Jacques Millet1
- Jakob Christoph Blarer von Wartensee1
- Jalal al-Din al-Suyuti1
- Jawād ibn Saʻd Jawād al-Baghdādī1
- Jean Bayard1
- Jean Gerson1
- Jean Manesca1
- Jean Passerat1
- Joham de Vernoils1
- Johannes Lichtenberger1