Author
- Ismāʻīl Qarah Kamāl1
- Ismāʻīl ibn Aḥmad Ibn al-Athīr1
- Ismāʻīl ibn Muḥammad Māzandarānī1
- Ismāʻīl ibn Muḥammad al-ʻAjlūnī1
- Israel Alnaqua1
- Israel Yaakov Algazi1
- Issachar ben Mordecai ibn Susan1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Jacob Berab1
- Jacob Meyer1
- Jacob ben Asher1
- Jacob ben David ben Yom Tov1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jacob ben Machir ibn Tibbon1
- Jacob ben Reuben ibn Zur1
- Jacob ibn Habib1
- Jacobus Dinetus1
- Jacobus de Teramo1
- Jacobus de Voragine1
- Jacopo Ragone1