- Jiří, z Poděbrad, King of Bohemia, 1420-14711
- Joannes de Caligariis1
- Job (Biblical figure)1
- John Chrysostom, Saint, -40718
- Joseph (Son of Jacob)1
- Judaism6
- Judaism--Customs and practices19
- Judaism--Liturgy6
- Judaism--Prayers and devotions9
- Judgment Day1
- Jugurthine War (111-105 B.C.)2
- Julian, of Eclanum, Bishop, 380-approximately 4551
- Julii family1
- Julius III, Pope, 1487-15551
- Justinian I, Emperor of the East, 483?-5652
- Kabbalat Shabbat1
- Kansas--Lawrence2
- Ketubah1
- Kiddush1
- Kings and rulers1