Author
- Ibrāhīm ibn Mūsá Ṭarābulusī1
- Ibrāhīm ibn Yaḥyá Tilimsānī1
- Ibrāhīm ibn Ḥusayn1
- Ilyās ibn ʻAbbās Mullā Shaykh al-Kurdī1
- Imami Heravi1
- Imbert Feutrier1
- Immanuel Bonfils1
- Imām al-Dīn ibn Luṭf Allāh Lāhūrī1
- Inayat Khan1
- Inayet Efendi1
- Innocent III1
- Isaac Aboab1
- Isaac Israeli ben Joseph1
- Isaac Lopez1
- Isaac Sasportas1
- Isaac the Blind1
- Isaak ben Meïr from Düren1
- Isidore of Seville1
- Ismail bin Mohammad Rizi1
- Ismāʻīl Jarrāḥī1