People who have competed at Australian Brazilian jiu-jitsu and grappling events. Australia only, for now. See Australian BJJ rankings for recorded wins by belt, state, and ruleset.
| Nicholas Harding | Unknown belt | Team Perosh MMA |
| Nicholas Harding-Brown | Grey | Gracie Barra Tamworth (AU) |
| Nicholas Hogan | White | Australian Elite Team |
| Nicholas Howarth | White | Renegade Grappling |
| Nicholas Ilijas | Blue | Gracie Elite Australia |
| Nicholas Jabarian | Grey | Gracie Barra Sydney |
| Nicholas James Jackson | Unknown belt | Coastal BJJ Wynyard |
| Nicholas Johnstone | White | T Jiu Jitsu |
| Nicholas Jones | White | Atlas Martial Arts / Arruda BJJ |
| Nicholas Kakoliris | Blue | Arruda BJJ |
| Nicholas Katsikakis | Grey | The Grappling Lab Prestons |
| Nicholas Keirouz | White | Gracie Barra Broadbeach |
| Nicholas Keogh-peel | White | Favela Jiu-Jitsu & MMA Australia |
| Nicholas Kerswell | Blue | Alliance Jiu-Jitsu Australia |
| Nicholas Kim | Grey | Lake Macquarie Jiu-Jitsu |
| Nicholas Koukounakis | White | Australian Elite Team |
| Nicholas Lane | White | BRAVOS BJJ |
| Nicholas Liaris | White | Will Machado - Comp Team |
| Nicholas Loureiro | White | Coringa Jiu-Jitsu |
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