Author
- Immanuel Bonfils1
- Immanuel Tremellius1
- Inayet Efendi1
- Innocent III1
- Innocent VIII1
- Insha Allah Khan1
- Isaac Lopez1
- Isaac Sasportas1
- Isaac ben Joseph of Corbeil1
- Isaac of Troki1
- Isaak Aaron Ettinger1
- Isaiah di Trani1
- Isidore of Seville1
- Iskandar Rūmī1
- Ismail bin Mohammad Rizi1
- Ismāʻīl Jarrāḥī1
- Ismāʻīl ibn Aḥmad Ibn al-Athīr1
- Ismāʻīl ibn Ghunaym Jawharī1
- Ismāʻīl ibn Luṭf Allāh Bākharzī1
- Ismāʻīl ibn Muḥammad Māzandarānī1