- Ibn al-Hāʼim, Aḥmad ibn Muḥammad, d. 1412. Tuḥfat al-ṭullāb1
- Ibn al-Jarādiqī, Muḥammad ibn ʻAlī, approximately 1373-14571
- Ibn al-Murtaḍá, Aḥmad ibn Yaḥyá, 1363-1437. Miʻyār al-ʻuqūl fī ʻilm al-uṣūl1
- Ibn al-Nāẓim, Muḥammad ibn Muḥammad, d. 1287 or 8. Sharḥ al-Alfīyah1
- Ibn al-Sāʻātī, Aḥmad ibn ʻAlī, 1254-1294 or 1295. Badīʻ al-niẓām al-jāmiʻ bayna Kitāb al-Bazdawī wa-al-aḥkām1
- Ibn al-ʻArabī, 1165-12401
- Ibn al-Ḥabbāk, Muḥammad ibn Aḥmad, d. 1462 or 3. Bughyat al-ṭullāb fī ʻilm al-asṭurlāb1
- Ibn ʻAqīl, ʻAbd Allāh ibn ʻAbd al-Raḥmān, 1294?-1367. Sharḥ al-Alfīyah1
- Ibn ʻUmrān, Muḥammad ibn Mūsá, 1392-14691
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyat1
- Iran--Dizfūl1
- Iran--Sabzevār (Khurāsān-i Raz̤avī)1
- Iraq1
- Iraq--Baghdad1
- Ishārāt wa-al-tanbīhāt (Avicenna)1
- Islamic calendar1
- Islamic cosmology1
- Islamic ethics1
- Islamic etiquette1
- Islamic learning and scholarship1