- Ji bu--Zong ji lei--Cong bian1
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Jighmīnī, Maḥmūd ibn Muḥammad, -1221? Qānūnchah1
- Jighmīnī, Maḥmūd ibn Muḥammad, -1221?. Qānūnchah1
- Jihad2
- Jinn3
- John, of Damascus, Saint1
- Joseph (Son of Jacob)1
- Joseph (Son of Jacob) in the Qurʼan1
- Judaism8
- Judas Iscariot1
- Judges (Islamic law)3
- Judgment Day (Islam)24
- Judicial power (Islamic law)1
- Judicial process (Islamic law)1
- Juhd al-muqill (Sājaqlīzādah, Muḥammad ibn Abī Bakr)1
- Julian, of Eclanum, Bishop, 380-approximately 4551
- Jumʻah10
- Jurisprudence1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-14132