Author
- Isaac Newton1
- Isaac of Troki1
- Ismail ibn Hammad al-Jawhari1
- Ismāʻīl Ghāzānī1
- Ismāʻīl Mufīd1
- Israel Alnaqua1
- Israel Yaakov Algazi1
- Istanbulī, Muṣṭafá Zakī1
- Isḥāq ibn Ibrāhīm Fārābī1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Jacob Israel Karmi1
- Jacob Meyer1
- Jacob ben Reuben ibn Zur1
- Jaghmini1
- Jai Singh II1
- Jalal al-Din Mohammad Tabrizi1
- Jamshīd al-Kāshī1
- Jamāl al-Dīn Khvānsārī1
- Jawād ibn Saʻd Jawād al-Baghdādī1
- Jewish Community of Amsterdam, Netherlands1