- Ibn Umayl, Muḥammad, active 10th century. Māʼ al-waraqī wa-al-arḍ al-najmīyah1
- Ibn Umayl, Muḥammad, active 10th century. Risālat al-Shams ilá al-Hilāl1
- Ibn al-Biṭrīq, Yūḥannā, -approximately 8151
- Ibn al-Fāriḍ, ʻUmar ibn ʻAlī, 1181 or 1182-1235. Tāʼīyah1
- Ibn al-Hāʼim, Aḥmad ibn Muḥammad, -1412. Maʻūnah fī ʻilm al-ḥisāb al-hawāʼī.--Abridgment1
- Ibn al-Jazarī, Muḥammad ibn Muḥammad, 1350-1429. Arbaʻūn masʼalah min masāʼil muskhilah1
- Ibn al-Mibrad, Yūsuf ibn Ḥasan, 1436 or 1437-15031
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz al-Qānūn fī al-ṭibb1
- Ibn al-Nafīs, ʻAlī ibn Abī al-Ḥazm, 1210 or 1211-1288. Mūjaz fī al-ṭibb1
- Ibn al-ʻImād al-Aqfahsī, Aḥmad, approximately 1349-1405. Ādāb mā yatakarraru fī al-yawm wa-al-laylah1
- Ibn ʻAbd al-Barr, Yūsuf ibn ʻAbd Allāh, 978 or 979-1071. Jāmiʻ bayān al-ʻilm wa-faḍlih1
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Tahdhīb al-Tahdhīb.--Abridgment1
- Ibn Ḥijjah al-Ḥamawī, Taqī al-Dīn Abū Bakr ibn ʻAlī, -1434. Badīʻīyat1
- Interest (Islamic law)1
- Interfaith relations1
- Iran--Dizfūl1
- Iran--Sabzevār (Khurāsān-i Raz̤avī)1
- Iran--Urūmīyah1
- Iraq1
- Isfarāyīnī, Muḥammad ibn Muḥammad, -1285. Ḍawʼ al-Miṣbāḥ1