Author
- Ilyās ibn ʻAbbās Mullā Shaykh al-Kurdī1
- Imam Birgivi1
- Imām al-Dīn ibn Luṭf Allāh Lāhūrī1
- Innocent IV1
- Innocent XI1
- Iohannes de Ianna1
- Irbilī, Aḥmad ibn Mūsá, d. 12251
- Isaac Aboab of Castile1
- Isaac Albalag1
- Isaac Israeli ben Joseph1
- Isaac Israeli ben Solomon1
- Isaac Lattes1
- Isaac ibn Ezra1
- Isaac ibn Ghiyyat1
- Isaac of Troki1
- Isaak ben Meïr from Düren1
- Ishmael ben Abraham Isaac ha-Kohen1
- Ismail al-Isfahani1
- Ismāʻīl Qarah Kamāl1
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī1