Author
- Jacob Berab1
- Jacob Meyer1
- Jacob ben Asher1
- Jacob ben David ben Yom Tov1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jacob ben Machir ibn Tibbon1
- Jacob ben Reuben ibn Zur1
- Jacob ibn Habib1
- Jacobus Dinetus1
- Jacobus de Teramo1
- Jacobus de Voragine1
- Jacopo Ragone1
- Jacopone da Todi1
- Jacques Legrand1
- Jacques Millet1
- Jagannatha Panditaraja1
- Jalal al-Din Mohammad Tabrizi1
- Jalal al-Din al-Qazwini1
- Jalaluddin al-Mahalli1
- Jamāl al-Dīn Ḥaṣīrī1