Author
- Ibrāhīm ibn Ḥusayn2
- Ikhtiyār al-Dīn ibn Ghiyāth al-Dīn2
- Immanuel Frances2
- Innocent V2
- Isaac Aboab2
- Isaac ben Mordekhai Kimḥi2
- Isaac of Troki2
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 13462
- Jacob ben Jacob, ha-Kohen, -approximately 12702
- Jacopo Piccolomini-Ammannati2
- Jacopone da Todi2
- Jakob Reifmann2
- James of Lausanne2
- Jamāl al-Dīn Khvānsārī2
- Jamāl al-Dīn Ḥaṣīrī2
- Jarmakī, Abū Bakr ibn al-Ṭāhir, 18th cent2
- Jayāditya2
- Jean Germain2
- Jehiel ben Jekuthiel ben Benjamin Anav2
- Joan Martines2