Encyclopedias, Almanacs, Transcripts, and Maps
- John Vincentius, St.
- John Welles
- John X Camateros, Patriarch of Constantinople
- John X, Pope
- John XI Beccus, Patriarch of Constantinople
- John XI, Pope
- John XII, Pope
- John XIII, Pope
- John XIV Calecas, Patriarch of Constantinople
- John XIV, Pope
- John XIX, Pope
- John XV, Pope
- John XVI, Antipope
- John XVII, Pope
- John XVIII, Pope
- John XX, Pope
- John XXI, Pope
- John XXII, Pope
- John XXIII, Antipope
- John XXIII, Pope, Bl.