Author
- Isaac Aboab of Castile1
- Isaac Israeli ben Joseph1
- Isaac Newton1
- Isaac of Troki1
- Isaac the Blind1
- Isaak ben Meïr from Düren1
- Isabella I of Castile1
- Isidore of Seville1
- Ismāʻīl Qarah Kamāl1
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī1
- Ismāʻīl ibn Muḥammad al-ʻAjlūnī1
- Isobel Salcedo Larralde1
- Israel Alnaqua1
- Israel Yaakov Algazi1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Ja'far Kashfi1
- Jaafar Al-Sadiq1
- Jabartī, Ḥasan ibn Ibrāhīm, 1698 or 1699-1774?1
- Jacob Berab1
- Jacob Meyer1