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 Angus | White | Casey Elite Martial Arts |
| William Archer | Blue | Flow State BJJ - Chelsea Heights |
| William Aston | White | Corporate Box Fortitude Valley |
| William Atton | Blue | Parramatta Jiu Jitsu Academy |
| William Austin | Unknown belt | 360 Martial Arts and Fitness |
| William Bakhos | Purple | Origin Mixed Martial Arts |
| William Balemi | White | Renegade Grappling |
| William Barrett | Grey | XXX Fight Academy |
| William Bartilomo | Grey | Lemos Brazilian Jiu-Jitsu Academy |
| William Barton-Harvey | Grey | TJJ SCHOOL AUSTRALIA |
| William Bellenger | White | Gracie Barra Shellharbour |
| William Billy Becke | Yellow | CAZA BJJ Australia |
| William Bonomy | White | Limitless MMA |
| William Borg | Grey | WOLFLIFE ACADEMY |
| William Boyle | Grey | MVMA Macleay Valley Martial Arts |
| William Brand | Grey | Fight Club Jiu-Jitsu team |
| William Breheny | Blue | Limitless MMA |
| William Buckley | White | Elite BJJ Coaching |
| William Bunn | Black | Movement Martial Arts |
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