| Tredrea | J. T. | Wine Merchants Assistant | Perth | 1889 | WA Almanack |
| Tredrea | J. T. | Wine Cafe | 114 Barrack Street, Perth | 1897 | Witton's Directory |
| Tredrea | J. T. | Wine Merchant | Edward Street, Perth | 1897 | Witton's Directory |
| Tredrea | W. | | Havelock Street, Perth | 1897 | Witton's Directory |
| Tredrew | J. | Teamster | Maitland River | 1879 | Herald Almanack |
| Treen | Mrs | - | Busselton & Sussex District | 1867 | WA Almanack |
| Treen | Mrs. | - | Busselton & Sussex Districts | 1868 | WA Almanack |
| Tregoning | Mrs. | Ladies School | Geraldton | 1879 | Herald Almanack |
| Tregoning | Mrs. | Ladies' Seminary | Geraldton | 1880 | Herald Almanack |
| Tregoning | Mrs. | Ladies Seminary | Geraldton | 1881 | Herald Almanack |
| Tregoning | W. P. | Freemasons Hotel | Albany | 1864 | WA Almanack |
| Treloar | F. | Miner | Peak Hill | 1897 | Witton's Directory |
| Treloar | W. J. | | Bridgetown | 1897 | Witton's Directory |
| Tremmer | A. | Farmer & Sheepowner | Kojonup | 1876 | Herald Almanack |
| Tremmer | A. | Farmer & Sheep Owner | Road Between Perth & Albany - Kojonup | 1877 | Herald Almanack |
| Tremmer | A. | Farmer & Sheepowner | Kojonup | 1878 | Herald Almanack |
| Tremmer | A. | Farmer & Sheepowner | Kojonup | 1879 | Herald Almanack |
| Tremmer | A. | Farmer & Sheepowner | Kojonup | 1880 | Herald Almanack |
| Tremmer | A. | Farmer & SheepOwner | Kojonup | 1881 | Herald Almanack |
| Trenchard | - | | Bulwer Avenue, Perth | 1897 | Witton's Directory |
| Trenchard | Henry G. | | Bulwer Avenue, Perth | 1897 | Witton's Directory |
| Trenchard | Hy G. | Consulting Engineer | Havelock Street, Perth | 1897 | Witton's Directory |
| Trencher | F. W. | Acting Post-Master | Greenough | 1897 | Witton's Directory |
| Trennor | J. | Boot & Shoemaker | Perth | 1874 | Herald Almanack |
| Trenoweth | E. R. | Mining Engineer | Shaw Street, Coolgardie | 1897 | Witton's Directory |
| Tresidder | Wm. | | Murray Street, Perth | 1897 | Witton's Directory |
| Trestrail | Rev T. | The Manse, Wesleyan Church | Forrest Street, Coolgardie | 1897 | Witton's Directory |
| Tretheway | S. | Miner | Victoria District (Northampton) | 1884 | WA Almanack |
| Tretheway | S. | Miner | Victoria District (Northampton) | 1886 | WA Almanack |
| Tretheway | S. | Miner | Northampton | 1887 | WA Almanack |
| Tretheway | S. | Miner | Northampton | 1888 | WA Almanack |
| Tretheway | S. | Miner | Northampton | 1889 | WA Almanack |
| Trethowan | W. | Physician & Surgeon | Lake Street, Perth | 1897 | Witton's Directory |
| Trevaski | J. | Warehouseman | Victoria District (Northampton) | 1886 | WA Almanack |
| Trevaski | J. | Warehouseman | Northampton | 1887 | WA Almanack |
| Trevaski | J. | Warehouseman | Northampton | 1888 | WA Almanack |
| Trevaski | J. | Warehouseman | Northampton | 1889 | WA Almanack |
| Trevaskis | J. | teamster | Victoria District (Northampton) | 1880 | WA Almanack |
| Trevaskis | J. | Teamster | Victoria District (Northampton) | 1881 | WA Almanack |
| Trevaskis | J. | Teamster | Victoria Districts (Northampton) | 1882 | WA Almanack |
| Trevaskis | J. | Warehouseman | Victoria District (Northampton) | 1884 | WA Almanack |
| Trevaskis | J. | Overseer | Northampton | 1885 | Herald Almanack |
| Trevor | C. | | Dyer Street, Perth | 1897 | Witton's Directory |
| Trew | G | Farmer | York | 1883 | Herald Almanack |
| Trew | G. | Farmer | York | 1873 | Herald Almanack |
| Trew | G. | Farmer | York | 1874 | Herald Almanack |
| Trew | G. | Farmer | York | 1874 | WA Almanack |
| Trew | G. | Farmer | York | 1875 | Herald Almanack |
| Trew | G. | Farmer | York | 1875 | WA Almanack |
| Trew | G. | Farmer | York | 1876 | Herald Almanack |
