- Hadith--Study and teaching1
- Historiography1
- History, Ancient1
- History, Military1
- History--Philosophy1
- Horses1
- Ibn Saʻādah, Aḥmad ibn ʻAlī, active 13th century. Risālat al-ʻilm1
- Ibn al-Fāriḍ, ʻUmar ibn ʻAlī, 1181 or 1182-1235. Tāʾīyah1
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb1
- Ibn al-ʻArabī, 1165-12401
- Ijtihād (Islamic law)1
- Imams (Shiites)--Biography1
- Imāmʹzādah, Muḥammad ibn Abī Bakr, 1097 or 1098-1177 or 1178. Shirʻat al-Islām1
- India--Delhi1
- India--Hyderabad1
- Inheritance and succession (Islamic law)1
- Iran--Dizfūl1
- Iran--Khurāsān1
- Iran--Mashhad1
- Islam--Rituals1