Author
- Ibrāhīm Ibn ʻAbd al-Ṣamad1
- Ibrāhīm al-Ḥalabī1
- Ibrāhīm ibn Yaḥyá Ibn Ghannām1
- Ibrāhīm ibn ʻAlī Qalqashandī1
- Imbert Feutrier1
- Innocent I1
- Isaac Alfasi1
- Isaac the Blind1
- Isabella I of Castile1
- Ismāʻīl Jarrāḥī1
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī1
- Ismāʻīl ibn Aḥmad Ibn al-Athīr1
- Jacob ben Asher1
- Jacob ben David ben Yom Tov1
- Jacob ibn Habib1
- Jacobus Dinetus1
- Jakob Christoph Blarer von Wartensee1
- Jean Bayard1
- Jean Passerat1
- Jerónimo Román y Zamora1