Author
- Isaac the Blind1
- Ismail ibn Hammad al-Jawhari1
- Ismāʻīl ibn Ibrāhīm İsfendiyaroǧlu1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Jacob ben David ben Yom Tov1
- Jacob ibn Habib1
- Jean de Bernuy1
- Jerónimo Román y Zamora1
- Joan Martines1
- Johann Neudörffer the Elder1
- Johannes Schöner1
- John Crosse1
- John Harington1
- John Montgomery1
- Josef ibn Tabul1
- Joseph Nasi1
- Joseph ben Abraham Gikatilla1
- Judah Hadassi1
- Khālid ibn ʻAbd Allāh al-Azharī1
- Kollegium Sankt Nikolaus1