- Ibn Ḥajar al-Haythamī, Aḥmad ibn Muḥammad, approximately 1503-approximately 1566. Fatḥ al-mubīn li-sharḥ al-Arbaʻīn1
- Ijtihād (Islamic law)1
- Imams (Shiites)1
- Immortality--Islam1
- Intention--Religious aspects--Islam1
- Interest (Islamic law)1
- Interfaith relations1
- Islamic New Year1
- Islamic countries1
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Judges (Islamic law)1
- Judgment Day (Islam)1
- Jārūdī, Nāṣir ibn Muḥammad, active 18th century1
- Kalbī, Diḥyah ibn Khalīfah, -approximately 6701
- Kashshāf (Zamakhsharī, Maḥmūd ibn ʻUmar)1
- Manuscripts, Persian1
- Mathematics, Arab1
- Months1
- Moral exhortation1
- Muftis (Muslim officials)1