Author
- Isaac Alfasi2
- Isaac ben Mordekhai Kimḥi2
- Isaac of Troki2
- Ishmael ben Abraham Isaac ha-Kohen2
- Ismāʻīl ibn Ibrāhīm İsfendiyaroǧlu2
- Jacob ben Asher2
- Jacopone da Todi2
- Jakob Reifmann2
- Jaʻfar Astarābādī2
- John Chrysostom2
- Jordan von Quedlinburg2
- Josef ibn Tabul2
- Joseph ben Gorion2
- Josephus2
- Juana I of Castile2
- Judah Leib Pukhovitser2
- Judah Rosanes2
- Judah ben Saul ibn Tibbon2
- Kamalākara Bhaṭṭa2
- Kamalākarabhaṭṭa2