| Williams | I. T. | Williams Road | Reo Truck | CO ● 126 | Collie Road Board | 1926-27 |
| Williams | Isaac | Mount Barker | Studebaker | PL ● 60 | Plantagenet Road Board | 1923-24 |
| Williams | Isaac | Mount Barker | Studebaker | PL ● 60 | Plantagenet Road Board | 1924-25 |
| Williams | Isaac | Mount Barker | Buick | PL ● 60 | Plantagenet Road Board | 1927-28 |
| Williams | J. | Ravensthorpe | Indian 8-10 H.P. Motorcycle | PR ● 6 | Phillips River Road Board | 1917-18 |
| Williams | J. | Goomalling | Dodge 25 H.P. | GO ● 32 | Goomalling Road Board | 1917-18 |
| Williams | J. | Goomalling | Dodge | GO ● 32 | Goomalling Road Board | 1924-25 |
| Williams | J. | York Road, Greenmount | Ford | 6943 | Metro Private Car | 1925-26 |
| Williams | J. | Lake Grace | Ford Truck | LG ● 28 | Lake Grace Road Board | 1925-26 |
| Williams | J. | Huiogine | Buick | GO ● 32 | Goomalling Road Board | 1925-26 |
| Williams | J. | York Road, Greenmount | Ford | 6943 | Metro Private Car | 1926-27 |
| Williams | J. | Hulogine | Buick | GO ● 32 | Goomalling Road Board | 1926-27 |
| Williams | J. | Lake Grace | Ford Truck | LG ● 28 | Lake Grace Road Board | 1926-27 |
| Williams | J. | York Road, Greenmount | Ford | 6943 | Metro Private Car | 1927-28 |
| Williams | J. | Lake Grace | Ford Truck | LG ● 28 | Lake Grace Road Board | 1927-28 |
| Williams | J. | Hulogine | Buick | GO ● 32 | Goomalling Road Board | 1927-28 |
| Williams | J. B. | Northampton | Buick | NR ● 120 | Northampton Road Board | 1925-26 |
| Williams | J. B. | Northampton | Buick | NR ● 120 | Northampton Road Board | 1926-27 |
| Williams | J. B. | Northampton | Buick | NR ● 7 | Northampton Road Board | 1927-28 |
| Williams | J. B. | Northampton | Dodge | NR ● 120 | Northampton Road Board | 1927-28 |
| Williams | J. F. | Merredin | Ford 20 H.P. | MRB 25 | Merredin Road Board | 1915 |
| Williams | J. F. | 51 First Avenue, Mount Lawley | Studebaker 20 H.P. | P 432 | Perth Municipality | 1919 |
| Williams | J. F. | - | Studebaker | P ● 432 | Perth Road Board | 1919 |
| Williams | J. F. | 51 1st Avenue, Mount Lawley | Studebaker | 3122 | Metropolitan Hire and Trade Cars | 1923-24 |
| Williams | J. F. | 51 First Avenue, Mount Lawley | Studebaker | 3122 | Metro Private Car | 1924-25 |
| Williams | J. G. | Allanson | Rugby | CO ● 158 | Collie Road Board | 1927-28 |
| Williams | J. J. | Carnarvon | Republic Truck | CN 57 | Carnarvon Municipal Council | 1924-25 |
| Williams | J. J. | Carnarvon | Republic Truck | CN 57 | Carnarvon Municipal Council | 1925-26 |
| Williams | J. J. | Carnarvon | Republic Truck | CN 57 | Carnarvon Municipal Council | 1926-27 |
| Williams | J. J. | Bridgetown | Ford Truck | B ● 182 | Bridgetown Road Board | 1927-28 |
| Williams | J. M. H. | Gabbin | Ford Truck | MM ● 61 | Mount Marshall Road Board | 1926-27 |
| Williams | J. M. H. | Gabbin | Ford Truck | MM ● 61 | Mount Marshall Road Board | 1927-28 |
| Williams | J. M. H. | Gabbin | Chevrolet | MM ● 175 | Mount Marshall Road Board | 1927-28 |
| Williams | J. N. | Wannamal | Chevrolet | CH ● 33 | Chittering Road Board | 1927-28 |
| Williams | J. V. | Wannamal | Chevrolet | CH ● 33 | Chittering Road Board | 1925-26 |
| Williams | J. V. | Wannamal | Chevrolet | CH ● 33 | Chittering Road Board | 1926-27 |
| Williams | J. W. | 130 Beaufort Street | B.S.A. | P 9 | Perth Municipality | 1916 |
| Williams | J. W. | Allanson | Ford | CO ● 7 | Collie Road Board | 1926-27 |
| Williams | James | Goomalling | Dodge 25 H.P. | GO ● 32 | Goomalling Road Board | 1923-24 |
| Williams | James F. | Saint George's Terrace | Daimler 20 H.P. | P 698 | Perth Municipality | 1916 |
| Williams | Jas H. | Newcastle Road | Chevrolet | N 186 | Northam Municipality | 1927-28 |
| Williams | Jno. | Carnarvon | Indian Motorcycle | CN 2 | Carnarvon Municipal Council | 1922-23 |
| Williams | John P. | 78 Lawley Street, Mount Lawley | Buick | 4253 | Metro Private Car | 1927-28 |
| Williams | Joseph | Phillips River | Triumph 4 H.P. | - | Phillips River Road Board | 1915 |
| Williams | Joseph | Northampton | Chevorlet 18 H.P. | NR ● 25 | Northampton Road Board | 1922-23 |
| Williams | Joseph | Northampton | Chevrolet 18 H.P. | NR ● 25 | Northampton Road Board | 1923-24 |
| Williams | K. | Northampton | Chevrolet 20 H.P. | NR 12 | Northampton Road Board | 1919 |
| Williams | K. | Northampton | Chevrolet | NR ● 12 | Northampton Road Board | 1924-25 |
| Williams | K. | Northampton | Chevrolet | NR ● 12 | Northampton Road Board | 1925-26 |
| Williams | K. | Northampton | Chevrolet | NR ● 12 | Northampton Road Board | 1926-27 |
