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 Henderson | Grey | Vigor Martial Arts |
| William Hoad | Grey | Ultimate Jiu Jitsu |
| William Hobday | Grey | Grappling Bros / GFTeam |
| William Hooper | White | Carlson Gracie Gold Coast |
| William Hopoate | White | TRINITY Australia |
| William Hughes | Grey | Gracie Barra Edgeworth |
| William Hupp | White | Quantum Martial Arts JJ |
| William Jeffreys | Grey | Ako Martial Arts |
| William Johnson | White | INTEGR8 Martial Arts & Fitness |
| William Kang | White | Alpha MVMT |
| William Klein | Purple | ONE Jiu-Jitsu Academy |
| William Kuip | Unknown belt | Valor Performance Centre |
| William Le | White | Apex Brazilian Jiu Jitsu |
| William Loebis-Arnost | Black | Australian Elite Team |
| William Lovern | Grey | SOUTHSIDE BRAZILIAN JIU-JITSU OFFICIAL |
| William Ludlow | White | Infinity Brazilian Jiu JItsu Australia |
| William Lythgoe | Yellow | Gemina |
| William Machin | White | Elements Grappling Academy |
| William Maciejowski | White | High Rollers |
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