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.
| William David Ryan | Purple | De Been 100% Jiu Jitsu |
| William David Starling | Grey | Modern Musashi Brazilian Jiu Jitsu |
| William Davidson | Grey | Roar MMA Rockingham |
| William Davies | Grey | De Been 100% Jiu Jitsu |
| William Davis | Grey | Lemos Brazilian Jiu-Jitsu Academy |
| William Dean | Grey | Submission Factory Jiu Jitsu |
| William Di Lello | White | Roar MMA Bibra Lake |
| William Douglas | White | Gracie Barra Tamworth (AU) |
| William Drake | Unknown belt | Flow Martial Arts Coolangatta |
| William Dyer | Grey | Cia Paulista Australia |
| William Ellery | Unknown belt | Invictus MMA - Tullamarine |
| William Ellison | White | Integrated MMA HQ |
| William Ford | White | Saltwater Jiu-Jitsu |
| William Fyson | White | Ultimate Jiu Jitsu |
| William Gallagher | Grey | SJJA Team |
| William Garment | Unknown belt | Carioti MMA |
| William Gawad | White | Mota-Vation Brazilian Jiu Jitsu. |
| William Geraghty | Grey | Galeb BJJ |
| William Godden | Grey | Fight World Australia |
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