John - Juan
- John Abercromby
- John Acton
- John Adam
- John Alcock
- John Allen
- John Almeida
- John Almond
- John and Cyrus, Saints
- John and Michael Banim
- John and Paul, Saints
- John and Sebastian Cabot
- John Ashton
- John Asser
- John Austin
- John Bacon
- John Bannister Tabb
- John Bapst
- John Baptist Albertrandi
- John Baptist Brondel
- John Baptist de la Salle, Saint
- John Baptist de Rossi
- John Baptist de Rossi, Saint
- John Baptist Hogan
- John Baptist Purcell
- John Baptist Tolomei
- John Barbour
- John Barclay
- John Barrow
- John Barry
- John Beccus
- John Beche
- John Beche, Blessed
- John Bede Polding
- John Belasyse
- John Bellarini
- John Bellenden
- John Berchmans, Saint
- John Bosco, Saint
- John Boste, Saint
- John Boyce
