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.
| Declan Mulheran | Blue | Arte Suave Brazilian Jiu Jitsu |
| Declan Norris | Unknown belt | Sorell Martial Arts Academy SMAA |
| Declan O’connell | White | Grapple Factory |
| Declan Osborne | Grey | Behan Jiu Jitsu |
| Declan Robertson | Yellow | Grey Wolf Brazilian Jiu Jitsu |
| Declan Smith | Blue | Perth Hills - Legion 13 ( Midvale location) |
| Declan Teo | White | SJJA PARRAMATTA |
| Declan Van Den Berg | White | Fight World Australia |
| Declan Wagschall | Blue | SJJA Hornsby |
| Declan Wakefield | White | GRACIE HUMAITA BALMAIN |
| Declan Warner | White | MMA Fight Lab |
| Declan Watts | White | Integrated MMA HQ |
| Declan Yates | Blue | Will Machado - Comp Team |
| Declan Yeoh | Grey | LEGACY |
| Declan Zemanek | Grey | TRINITY Australia |
| Dede Arthaguna | White | Will Machado - Comp Team |
| Dee Landicho | White | Studio 55 Brazilian Jiu Jitsu |
| Deegan Davis-Wicks | Blue | Gracie Barra Hunter Valley |
| Deegan Smith | White | Base Training Centre |
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