People who have competed at Australian events. Australia only, for now.
| William Shannon | Blue | DCA MMA |
| William Sharp | Grey | SJJA Bulimba |
| William Shaughnessy | Grey | Port Stephens Brazilian JiuJitsu |
| William Smedley | White | Platinum Jiu Jitsu |
| William Smith | Blue | Broz Martial Arts · Black Dragon Kai |
| William Sorensen | Yellow | Matrix Gym Australia |
| William Starling | Grey | Modern Musashi Brazilian Jiu Jitsu |
| William Toilolo | Grey | Studio 55 Brazilian Jiu Jitsu |
| William Tsai | White | Quantum Martial Arts JJ |
| William Walker | White | MENNA TOP TEAM BJJ · Point Break Brazilian Jiu Jitsu |
| William Wallace | Yellow | Fight Club Jiu-Jitsu team |
| William Walters | White | Clube de Lutas |
| William Yelf | Grey | Gracie Barra Pymble |
| William Zaida | White | Harlequin's Brazilian Jiu-Jitsu |
| Willis Flanagan | Grey | Phronesis Jiu Jitsu |
| Williz Lopez | Grey | SOUTHSIDE BRAZILIAN JIU-JITSU OFFICIAL |
| Willow Callaghan | White | Behan Jiu Jitsu |
| Willow Garaven | Grey | Mackay MMA |
| Willow George | White | DOMINANCE |
Wave