| Oswell | F. J. A. | | Rokeby Road, Perth | 1897 | Witton's Directory |
| Oswell | W. | Clerk | Geraldton | 1897 | Witton's Directory |
| Ottaway | W. E. | | Roe Street, Perth | 1897 | Witton's Directory |
| Ottey | G. W. | Landing Waiter | Cossack | 1897 | Witton's Directory |
| Otto | J. H. | Auctioneer, Accountant and Interpreter | Albany | 1887 | WA Almanack |
| Otto | J. H. | Photographer & Interpreter | Albany | 1888 | WA Almanack |
| Otto | J. H. | Photographer & Interpreter | Albany | 1889 | WA Almanack |
| Otto | J. H. | Schoolmaster | Broome Hill | 1897 | Witton's Directory |
| Otway | M. | Farmer | Beverley | 1883 | Herald Almanack |
| Otway | M. | Farmer | Beverley | 1884 | Herald Almanack |
| Otway | M. | Farmer | Beverley | 1886 | WA Almanack |
| Otway | M. | Farmer | Beverley | 1887 | WA Almanack |
| Otway | M. | Farmer | Beverley | 1888 | WA Almanack |
| Otway | M. | Farmer | Beverley | 1889 | WA Almanack |
| Otway | Mary | Farmer | Beverley | 1879 | Herald Almanack |
| Otway | Mary | Farmer | Beverley | 1880 | Herald Almanack |
| Otway | Mary | Farmer | Beverley | 1882 | Herald Almanack |
| Otway | Mary | Farmer | Beverley | 1884 | WA Almanack |
| Otway | Mary | Farmer | Beverley (West Dale) | 1885 | Herald Almanack |
| Otway | Mary. | Farmer | Beverley | 1881 | Herald Almanack |
| Otway | Mrs T. | Farmer | Boyadine | 1897 | Witton's Directory |
| Ougden | H. T. | Saddler & Harness Maker | Perth | 1868 | WA Almanack |
| Ougden | H. T. | Saddler and Harness Maker | Perth | 1869 | WA Almanack |
| Ougden | H. T. | Saddler & Harness Maker | Perth | 1870 | WA Almanack |
| Ougden | H. T. | Saddler &c. | Fremantle | 1870 | WA Almanack |
| Ougden | J. | Boarding Housekeeper | Perth | 1863 | WA Almanack |
| Ougden | J. | House Proprietor | Perth | 1864 | WA Almanack |
| Ougden | J. | House Proprietor | Perth | 1865 | WA Almanack |
| Ougden | J. | Blacksmith & Victualler | Perth | 1866 | WA Almanack |
| Ougden | J. | Blacksmith & Victualler | Perth | 1867 | WA Almanack |
| Ougden | J. | Blacksmith & Victualler | Perth | 1868 | WA Almanack |
| Ougden | J. | Victualler | Perth | 1869 | WA Almanack |
| Ougden | J. | Victualler | Perth | 1870 | WA Almanack |
| Ougden | J. | Blacksmith and Farrier | Perth | 1872 | WA Almanack |
| Ougden | James | Blacksmith | Perth | 1863 | WA Almanack |
| Ougden | James | Blacksmith | Perth | 1864 | WA Almanack |
| Ougden | James | Blacksmith | Perth | 1865 | WA Almanack |
| Ougden | Miss | Government Schlmstrs. | Victoria Plains | 1877 | WA Almanack |
| Ougden | Miss | Gvt. Schlmstrs. (D) | Victoria Plains & Dandaragan | 1879 | WA Almanack |
| Ougden | Miss | Govt. Schoolmistress | Victoria Plains & Dandaragan | 1880 | Herald Almanack |
| Ougden | Miss. | Govt. Schoolmstrs. | Victoria Plains & Dandaragan | 1879 | Herald Almanack |
| Ougden | Miss. | Gvt. Schoolmaster (D) | Victoria Plains & Dandaragan | 1880 | WA Almanack |
| Ougden | Mrs Jas. | Carrier | Perth | 1873 | WA Almanack |
| Ougden | Mrs. J. | Carrier | Perth | 1874 | WA Almanack |
| Our Boys' Tailoring Co. | Burke C. P. | Wholesale & Retail Ironmonger | 104, 106 Murray Street, Perth | 1897 | Witton's Directory |
| Oury | G. | | Swan Street, North Fremantle | 1897 | Witton's Directory |
| Oury | Geo. | Indentor, Commision agent & Auctioneer | High Street, Fremantle | 1897 | Witton's Directory |
| Ouston | C. | Clerk | Northampton | 1885 | Herald Almanack |
| Outred | G. | Pearler | North-West Coast (Cossack) | 1882 | WA Almanack |
| Outred | G. | Master Mariner | Cossack | 1883 | Herald Almanack |
