- Italy--Pisa1
- Italy--Reggio Emilia (Province)1
- Jaghmīnī, Maḥmūd ibn Muḥammad, -1221?1
- Jamʻ al-jawāmiʻ fī al-uṣūl (Subkī, Tāj al-Dīn ʻAbd al-Wahhāb ibn ʻAlī)1
- Japan1
- Jean, de Verdun1
- Jerome, Saint, -419 or 4201
- Jewish calendar1
- Jewish sermons, Hebrew1
- Jewish way of life1
- Jews--Persecutions1
- John, Duke of Burgundy, 1371-14191
- John, the Baptist, Saint1
- Joseph (Son of Jacob)1
- Judaism--Doctrines1
- Judaism--Liturgy1
- Judeo-Arabic literature1
- Judeo-Persian language1
- Judges (Islamic law)1
- Judgment Day1