- Free will and determinism--Religious aspects--Islam1
- Future life--Islam1
- Geography1
- God (Islam)--Name1
- Hadith--Forgeries1
- Headbands1
- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh1
- Ibn Nujaym, Zayn al-Dīn ibn Ibrāhīm, -1563. Fatāwá al-Zaynīyah1
- Ijtihād (Islamic law)1
- Imāmʹzādah, Muḥammad ibn Abī Bakr, 1097 or 1098-1177 or 1178. Shirʻat al-Islām1
- Isbījābī, Aḥmad ibn Manṣūr, -approximately 1087. Sharḥ al-Mukhtaṣar fī al-fiqh1
- Islam1
- Islam--Rituals1
- Islamic countries1
- Istiṣḥāb (Islamic law)1
- Judgment Day (Islam)1
- Jumʻah1
- Kāshgharī, Sadīd al-Dīn, active 13th century? Munyat al-muṣallī wa-ghunyat al-mubtadiʼ1
- Leather doublures1
- Loans (Islamic law)1