- Johan S.H. van Leeuwaarden
- Johanna Amaya
- Johanna Mathieu
- Johanna Törnquist
- Johannes Emmerling
- Johannes J. Bisschop, Kevin Cunningham, Robert Fourer, David M. Gay, Brian W. Kernighan, Bjarni Kristjansson, Alexander Meeraus, and Linus Schrage
- Johannes Knörr
- Johannes Siebert
- John A. Muckstadt
- John A. Norton
- John Angelis
- John Batey
- John Birge
- John Buzacott
- John C. Liechty
- John C.W. Parsons
- John Coles
- John Coles
- John Cooper Fortney
- John D.C. Little
