| Climber Name | # Ascents Recorded | Notes |
|---|---|---|
| John Town | 0 | |
| John Wilkinson | 0 | |
| Jonathan Cook | 0 | |
| Jonathan Sin | 0 | |
| Jonathon Woods | 0 |
References[1] https://www.ukclimbing.com/forums/ukc/jonathon_woods_killed_at_pembroke-451486 |
| Jon Bracey | 0 | |
| Jon de Montjoye | 0 | |
| Jon Griffith | 0 | |
| Jon Krakauer | 0 | |
| Jon Partridge | 0 | |
| Jon Ratcliffe | 0 | |
| Jörg Lehne | 0 |
Jörg was killed while bivouacing at the base of the Walker Spur when he was struck by rockfall. References[1] Mountain 6 (1969), page6 |
| Joseph Knubel | 0 | |
| Josh Horsley | 0 |
Host of The Testpiece Podcast. |
| Josh Lowell | 0 | |
| Josh Muller | 0 |
References[1] Interview with Sonnie Trotter, 2024 https://www.youtube.com/watch?v=UfUmNZHEpSg |
| Josh Wharton | 0 |
References[1] Interview with Sonnie Trotter https://www.youtube.com/watch?v=Udaf_v2a9m0 |
| Josie McKee | 0 | |
| Józef Nyka | 0 |
References[1] https://www.himalayanclub.org/resources/people/jozef-nyka/ |
| J Sheppard | 0 |