- Jews--Politics and government1
- John I, King of Portugal, 1357-14331
- John, Duke of Burgundy, 1371-14191
- John, King of England, 1167-12161
- Jugurthine War (111-105 B.C.)1
- Justa, Saint, -approximately 2871
- Justinian I, Emperor of the East, 483?-5651
- Kekchi language1
- Kings and rulers--Genealogy1
- Kufic1
- Kufr (Islam)1
- Kāfiyah (Ibn al-Ḥājib, ʻUthmān ibn ʻUmar)1
- Ladino poetry1
- Land grants1
- Land tenure--Law and legislation1
- Landowners1
- Language and languages1
- Latin America1
- Latin language--Etymology1
- Latin language--Style1