Author
- Ibn Miftāḥ1
- Ibn Zafar1
- Ibn al-Haytham1
- Ibn al-Kharrāṭ1
- Ibn al-Tayyib1
- Ibn al-Wardi1
- Ibrāhīm Shabistarī1
- Ibrāhīm ibn Hibat Allāh Lakhmī1
- Ibrāhīm ibn Muḥammad Ṣafāqisī1
- Ibrāhīm ibn ʻAlī Ṭaraṣūṣī1
- Ikhtiyār al-Dīn ibn Ghiyāth al-Dīn1
- Inayet Efendi1
- Isaac Newton1
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 13461
- Issachar ben Mordecai ibn Susan1
- Isḥāq ibn Yūsuf Ṣardafī1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Jacob Berab1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jaghmini1