Author
- Isaac Lopez1
- Isaac Sasportas1
- Isaac of Troki1
- Isaak Aaron Ettinger1
- Ismail bin Mohammad Rizi1
- Ismāʻīl Jarrāḥī1
- Ismāʻīl ibn Aḥmad Ibn al-Athīr1
- Ismāʻīl ibn Luṭf Allāh Bākharzī1
- Ismāʻīl ibn Muḥammad Māzandarānī1
- Ismāʻīl ibn Sinān Sīwāsī1
- Ismāʻīl Ḥaqqī Āsikjīʹzādah1
- Issachar ben Mordecai ibn Susan1
- Izz al-Din ibn 'Abd al-Salam1
- Izzatullah Bengali1
- Jacob Jacobke Heilprin1
- Jacob ben Asher1
- Jacob ben Machir ibn Tibbon1
- Jacobus Dinetus1
- Jacobus de Voragine1
- Jacopo Ragone1