Author
- 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
- Jewish Community of Padua, Italy1
- Jews1
- Joshua Benzion Segre1
- Judah Leib Prossnitz1
- Judah Rosanes1
- Kahvecizâde, Ahmed bin Hüseyin1
- Kalonymus ben Kalonymus1
- Kamal al-Din al-Ghazzi1
- Kanjāwī, Jibrīl ibn ḥasan, 1351 or 21
- Khalaf Barbarī1