- Grace after meals3
- Grammar, Comparative and general--Affixes3
- Hadith--Language, style3
- Haggadah3
- Hinduism--Prayers and devotions3
- Hurufis3
- Ibn Bābawayh al-Qummī, Muḥammad ibn ʻAlī, 918 or 919-991 or 992. Man lā yaḥḍuruhu al-faqīh3
- Ibn Ḥajar al-ʻAsqalānī, Aḥmad ibn ʻAlī, 1372-1449. Nuzʹhat al-naẓar fī tawḍīḥ Nukhbat al-fikar3
- Ijtihād (Islamic law)3
- Intention--Religious aspects--Islam3
- Iran--Tabrīz3
- Iraq--Karbalāʼ3
- Islamic education3
- Istiṣḥāb (Islamic law)3
- Italy--Sicily3
- Iʻrāb ʻan qawāʻid al-iʻrāb (Ibn Hishām, ʻAbd Allāh ibn Yūsuf)3
- James, the Greater, Saint3
- Jamʻ al-jawāmiʻ fī al-uṣūl (Subkī, Tāj al-Dīn ʻAbd al-Wahhāb ibn ʻAlī)3
- Jerome, Saint, -419 or 4203
- Jews--Medicine3