- Ibn al-Sāʻātī, Aḥmad ibn ʻAlī, 1254-1294 or 5. Majmaʻ al-baḥrayn wa-multaqá al-nayyirayn1
- Ibn ʻUmrān, Muḥammad ibn Mūsá, 1392-14691
- Ibn Ḥajar al-Haythamī, Aḥmad ibn Muḥammad, approximately 1503-approximately 1566. Tuḥfat al-muḥtāj bi-sharḥ al-Minhāj1
- Illegitimacy1
- Illumination of books and manuscripts, English1
- Illumination of books and manuscripts, Italian1
- Illumination of books and manuscripts, Medieval1
- Incarnation1
- Inheritance and succession1
- Intellectual life1
- Interfaith relations1
- Iran--Tabrīz1
- Isagoge (Porphyry)1
- Islamic bookbinding1
- Islamic calendar1
- Islamic cosmology1
- Islamic education1
- Islamic etiquette1
- Islamic literature, Arabic1
- Islamic magic1