- Gulshan-i rāz (Shabistarī, Maḥmūd ibn ʻAbd al-Karīm)1
- Hadith--Forgeries1
- Hadith--Prophecies1
- Hanbalites1
- Ibn Abī Jumhūr al-Aḥsāʾī, Muḥammad ibn ʻAlī, -approximately 1473. Masālik al-afhām1
- Ibn Nawbakht, Ibrāhīm, active 10th century. Yāqūt fī ʻilm al-kalām1
- Ibn Sharaf Shāh, Ḥasan ibn Muḥammad, 1247 or 1248-1315 or 1316. Wāfīyah fī sharḥ al-Kāfīyah1
- Ibn al-ʻArabī, 1165-12401
- Ibn al-ʻArabī, 1165-1240. Janāḥ al-ṭāʼir1
- Ilāhʹābādī, Muḥibb Allāh. Taswīyah1
- India1
- Iran1
- Iran--Rasht1
- Ishrāqīyah1
- Islam and philosophy1
- Islam--Terminology1
- Islamic bookbinding1
- Islamic calendar1
- Islamic heresies1
- Islamic learning and scholarship1