- Italy--Naples1
- Italy--Pisa1
- Italy--Vercelli (Province)1
- Iʻrāb ʻan qawāʻid al-iʻrāb (Ibn Hishām, ʻAbd Allāh ibn Yūsuf)1
- Iḥyāʼ ʻulūm al-dīn (Ghazzālī)1
- Japan1
- Jerome, Saint, -419 or 4201
- Jewish (culture or style)1
- Jewish calendar1
- Jewish religious poetry, Hebrew1
- Jewish sermons, Hebrew1
- Jews--Conversion to Christianity1
- Jews--Legal status, laws, etc.1
- John II, King of Portugal, 1455-14951
- John, Duke of Burgundy, 1371-14191
- John, the Baptist, Saint1
- Joseph (Son of Jacob)1
- Judaism--Controversial literature1
- Judaism--Doctrines1
- Judeo-Arabic literature1