- John Digby (1618–1664)
- John Digby
- John Digby, 1st Earl of Bristol
- John Henderson, 5th of Fordell
- John FitzGerald of Dromana
- List of fellows of the Royal Society elected in 1663
- 17th century in philosophy
- Secretary of State (England)
- List of ambassadors of the Kingdom of England to Russia
- Richard Boyle, 1st Earl of Cork
