Author
- Ilyās ibn ʻAbbās Mullā Shaykh al-Kurdī1
- Imad ad-Din al-Isfahani1
- Imami Heravi1
- Imbert Feutrier1
- Immanuel Bonfils1
- Imām al-Dīn ibn Luṭf Allāh Lāhūrī1
- Inayat Khan1
- Inayet Efendi1
- Innocent I1
- Innocent VIII1
- Innocent XI1
- Insha Allah Khan1
- Isaac Aboab1
- Isaac Aboab I1
- Isaac Aboab of Castile1
- Isaac Israeli ben Joseph1
- Isaac Lopez1
- Isaac Newton1
- Isaac Sasportas1
- Isaac the Blind1