| Williamson | T. G. | Kylmore, Doodlakine | U4W and 12C, 19E | 1962 |
| WIlliamson | T. J. | Clyde Park, Dalwallinn | 1ZW | 1924 |
| Williamson | T. P. | Thule Farm, Wickepin | FW4 and 44C, 7E | 1962 |
| Williamson | T. P. | Southampton, Balingup | TW1 | 1962 |
| Williamson | Thomas | Wellington Locs. 3531, part of 194 and 249, Udue, Harvey | TW1 | 1928 |
| Williamson | Walter F | Thule Farm, 86 Gate, Wickepin | FW4 | 1924 |
| Williamson | Walter F. | Thule Farm, 86 Gate, Wickepin | FW4 | 1912 |
| Williamson | Wm. E | Lawlers | WE3 | 1924 |
| Williamson | Wm. E. | Lawlers | WE3 | 1912 |
| Williamson & Son | C. E. | Clyde Park, Dalwallinu | 1ZW and 52F, 48D | 1962 |
| Williamson & Son | G. J. | Leonora Red Acres, Nundamarra and Pine Ridge, Yuna | JV2 and 28D, 29E | 1962 |
| Williamson Bros. | - | Umuna, Beverley | U0V and 102D, 21E | 1962 |
| Willimott | F. E. S. | Applewood, Bridgetown | GT2 | 1912 |
| Willimott | George | Woolanooka, Walkaway | WR5 | 1912 |
| Willimott | R. | Woolanooka, Back Greenough | GW2 | 1912 |
| Willing | L. W. & E. J. | 1478, Busselton | LW7 and 119D, 17E | 1962 |
| Willington | Wm. | Glenrowan, East Narrogin | VW6 | 1912 |
| Willington | Wm. | Glenrowan, East Narrogin | BW6 | 1924 |
| Willis | A. W. & E. H. | 19983, Nukarni | 3KW and 50B, 9E | 1962 |
| Willis | G. A. | Naedyina Farm, Burracoppin | GV8 | 1924 |
| Willis | Geo. W. | Willis' Farm, Rockingham | 8VU | 1924 |
| Willis | H. A. | Loc. 10668, Merredin | XW7 and 14B, 103A | 1962 |
| Willis | H. E. | Locs. 10274-5-9, Northcliffe | 0GW | 1962 |
| Willis | Henry | Hammersley Farm, Table lands | LU6 | 1924 |
| Willis | J. | Lingdale, Bridgetown | JV8 and 39C, 107A | 1962 |
| Willis | J. D. | Loc. 2088, Donnybrook | 8WJ and 80B, 81E | 1962 |
| Willis | J. G. | Kallaroo, Kondinin | J0W and 12C, 22E | 1962 |
| Willis | Jas. | Clover Downs, Leonora | 2OS | 1912 |
| Willis | Jas. | Clover Downs, Leonora | 2OS | 1924 |
| Willis | Jos. | Winterfold Estate, South Fremantle | 5WV | 1924 |
| Willis | Joseph | Winterfold Estate, South Fremantle | 5WV | 1912 |
| Willis | T. W. | Fair Vue, Yandanooka | K6X and 11C, 9E | 1962 |
| Willis | Thomas W/arren | Fair Vue, Yandanooka | K6X | 1925 |
| Willis | Thos E. | Champion, Kanowna | TW9 | 1924 |
| Willis | Thos. E. | Champion, Kanowna | TW9 | 1912 |
| Willis | W. L. | Ashley, 20017, Nukarni | L7W and 7B, 112A | 1962 |
| Willis | Wm. Arthur | Avon Loc. 19983, Overdale, Newcastle | 3KW | 1924 |
| Willis & Sons | J. | Burnside, Mt. Barker | V2V | 1912 |
| Willis & Sons | J. | Burnside, Mt. Barker | V2V | 1924 |
| Willis Bros. | - | Walardy, Jitarning | 1WA | 1928 |
| Williss | S. A. & D. E. | Eatondale, Mt. Barker | O0U and 33B, 26E | 1962 |
| Williss | Sidney A. | Eatondale, Mt. Barker | O0U | 1924 |
| Williss & Co. | G. H. E. | Burnside, Mt. Barker | V2V and 43C, 7A | 1962 |
| Willmott | A. J. | Sandbrook, Pingelly | A6W | 1912 |
| Willmott | A. J. | Sandbrook, Pingelly | A6W | 1924 |
| Willmott | C. | Charlerton Park, Pingelly | 6WT | 1912 |
| Willmott | C. | Charleton Park, Pingelly | 6WT | 1924 |
| Willmott | Chas Hy. | Booridgie, Pingelly | 1HW | 1924 |
| Willmott | Chas. Hy. | Booridgie, Pingelly | 1HW | 1912 |
| Willmott | E. P. B. | Basildene, Margaret River | EW1 and 14C, 115E | 1962 |
