| Sinclair | Miss J. | Milliner | Albany | 1887 | WA Almanack |
| Sinclair | Miss J. | Milliner | Albany | 1888 | WA Almanack |
| Sinclair | Miss. | Milliner | Guildford | 1880 | WA Almanack |
| Sinclair | Miss. | Mlnr. & Dressmaker | Guildford | 1881 | WA Almanack |
| Sinclair | Miss. J. | Milliner | Albany | 1889 | WA Almanack |
| Sinclair | Mrs. | - | Guildford | 1879 | Herald Almanack |
| Sinclair | Mrs. | - | Guildford | 1880 | Herald Almanack |
| Sinclair | Mrs. | - | Guildford | 1881 | Herald Almanack |
| Sinclair | Mrs. | - | Guildford | 1882 | Herald Almanack |
| Sinclair | Mrs. | Dressmaker | Albany | 1882 | WA Almanack |
| Sinclair | Mrs. | Householder | Guildford | 1883 | Herald Almanack |
| Sinclair | Mrs. | HouseHolder | Guildford | 1884 | Herald Almanack |
| Sinclair | Mrs. | Householder | Guildford | 1885 | Herald Almanack |
| Sinclair | Mrs. | Dressmaker | Busselton, Etc. | 1887 | WA Almanack |
| Sinclair | R. | Carpenter (Willimas River) | Albany Road | 1879 | WA Almanack |
| Sinclair | R. | Carpenter | Albany Road (Williams River) | 1880 | WA Almanack |
| Sinclair | R. | Carpenter | Albany Road (Williams River) | 1881 | WA Almanack |
| Sinclair | R. | Carpenter | Albany Road (Williams River) | 1882 | WA Almanack |
| Sinclair | R. | Carpenter | Albany River (Williams River) | 1884 | WA Almanack |
| Sinclair | R. | Carpenter | Albany Road (Williams River) | 1886 | WA Almanack |
| Sinclair | R. | Carpenter | Williams River | 1887 | WA Almanack |
| Sinclair | R. | Carpenter | Albany Road(Williams River) | 1888 | WA Almanack |
| Sinclair | R. | Carpenter | Albany Road (Williams River) | 1889 | WA Almanack |
| Sinclair | R. | Assistant Telegraph Lineman | Birkshire Valley | 1897 | Witton's Directory |
| Sinclair | R. | Accountant | Esperance Bay | 1897 | Witton's Directory |
| Sinclair | Robert | Wheelwright | William's River | 1897 | Witton's Directory |
| Sinclair | T. | Farmer | Newcastle & Toodyay District | 1882 | WA Almanack |
| Sinclair | T. | Farmer | Newcastle | 1887 | WA Almanack |
| Sinclair | T. | Farmer | Newcastle | 1888 | WA Almanack |
| Sinclair | T. | Farmer | Newcastle | 1889 | WA Almanack |
| Sinclair | T. | Station Hand | Murgoo | 1897 | Witton's Directory |
| Sinclair | Thos. | Farmer | Toodyay (Glen Avon) | 1885 | Herald Almanack |
| Sinclair | Thos. | | Northam | 1897 | Witton's Directory |
| Sinclair | W. | Farmer | Newcastle & Toodyay District | 1882 | WA Almanack |
| Sinclair | W. | Farmer | Newcastle | 1887 | WA Almanack |
| Sinclair | W. | Farmer | Newcastle | 1888 | WA Almanack |
| Sinclair | W. | Farmer | Newcastle | 1889 | WA Almanack |
| Sinclair | W. H. | Accountant | Londonderry | 1897 | Witton's Directory |
| Sinclair Bros | - | Farmers | Toodyay | 1886 | WA Almanack |
| Sinclair Bros | - | Butchers | Newcastle | 1886 | WA Almanack |
| Sinclair Bros, | - | Farmers | Toodyay | 1879 | Herald Almanack |
| Sinclair Bros. | - | Farmer | Toodyay | 1878 | Herald Almanack |
| Sinclair Bros. | - | Butchers | Newcastle | 1880 | Herald Almanack |
| Sinclair Bros. | - | Farmers | Toodyay | 1880 | Herald Almanack |
| Sinclair Bros. | - | Farmers | Newcastle & Toodyay District | 1880 | WA Almanack |
| Sinclair Bros. | - | Butchers | Newcastle | 1882 | Herald Almanack |
| Sinclair Bros. | - | Farmers | Toodyay | 1882 | Herald Almanack |
| Sinclair Bros. | - | Farmer | Toodyay | 1883 | Herald Almanack |
| Sinclair Bros. | - | Butchers | Newcastle | 1883 | Herald Almanack |
| Sinclair Brothers | - | Butchers | Toodyay District (Newcastle) | 1879 | WA Almanack |
