- Ibn al-Jarādiqī, Muḥammad ibn ʻAlī, approximately 1373-14571
- Ibn al-Mibrad, Yūsuf ibn Ḥasan, 1436 or 1437-15031
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb1
- Ibn ʻUmrān, Muḥammad ibn Mūsá, 1392-14691
- Illegible markings1
- Illumination of books and manuscripts1
- Imams (Shiites)1
- Indexes1
- India1
- Inheritance and succession (Islamic law)1
- Intellectual life1
- Interest (Jewish law)1
- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1
- Islam and politics1
- Islam and state1
- Islam--Rituals1
- Islamic eschatology1
- Islamic etiquette1
- Islamic interpretations of Adam1
- Islamic sects1