| Owston | W. Senr. | - | Fremantle | 1881 | Herald Almanack |
| Owston | W. Senr. | Pearse & Owston Ship Owners & Importers | Fremantle | 1882 | Herald Almanack |
| Owston | W. Senr. | Pearse & Owston Ship Owner & Importers | Fremantle | 1883 | Herald Almanack |
| Owston | W. Senr. | Pearse & Owston, Ship Owners & Importers | Fremantle | 1884 | Herald Almanack |
| Owston | W. Senr. | Shipowners & Importers | Fremantle (Pearse & Owston) | 1885 | Herald Almanack |
| Owston | W.jun. | Shipowner and Importer | Fremantle | 1886 | WA Almanack |
| Oxenam | R. | Grazier | Northampton | 1883 | Herald Almanack |
| Oxenham | G. | Grazier | Victoria District (Northampton) | 1880 | WA Almanack |
| Oxenham | J. | Grazier | Victoria Districts (Northampton) | 1882 | WA Almanack |
| Oxenham | R. | Grazier | Mines | 1873 | Herald Almanack |
| Oxenham | R. | Grazier | Victoria District (Northampton) | 1874 | WA Almanack |
| Oxenham | R. | Grazier | Victoria District (Mines & Northampton) | 1876 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1877 | Herald Almanack |
| Oxenham | R. | Grazier | Victoria District (Northampton) | 1877 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1878 | Herald Almanack |
| Oxenham | R. | Grazier | Northampton | 1879 | Herald Almanack |
| Oxenham | R. | Grazier | Northampton | 1879 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1880 | Herald Almanack |
| Oxenham | R. | Grazier | Northampton | 1881 | Herald Almanack |
| Oxenham | R. | Grazier | Victoria District (Northampton) | 1881 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1882 | Herald Almanack |
| Oxenham | R. | Grazier | Victoria Districts (Northampton) | 1882 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1884 | Herald Almanack |
| Oxenham | R. | Grazier | Victoria District (Northampton) | 1884 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1885 | Herald Almanack |
| Oxenham | R. | Grazier | Victoria District (Northampton) | 1886 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1887 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1888 | WA Almanack |
| Oxenham | R. | Grazier | Northampton | 1889 | WA Almanack |
| Oxenham | Richard | Grazier | Victoria District (Mines Etc) | 1869 | WA Almanack |
| Oxenham | Richard | Grazier | Victoria District (Geraldine) | 1870 | WA Almanack |
| Oxenham | Richard | Grazier | Victoria District (Mines & Irwin) | 1872 | WA Almanack |
| Oxenham | Richard | Grazier | Victoria District (Northampton) | 1873 | WA Almanack |
| Oxenham | Richard | Grazier | Mines | 1874 | Herald Almanack |
| Oxenham | Richard | Grazier | Mines | 1875 | Herald Almanack |
| Oxenham | Richard | Grazier | Mines | 1875 | WA Almanack |
| Oxenham | Richard | Grazier | Mines | 1876 | Herald Almanack |
| Oxenham | W. | Grazier | Victoria Districts (Northampton) | 1882 | WA Almanack |
| Oxenham | W. | Shearer | Northampton | 1897 | Witton's Directory |
| Oxley & Co | J. O. | General Agents, Sharebrokers, etc, Office of The Hit or Miss Proprietary Gold Mines, Ltd, The King Soloman Gold Mines, Ltd, The Golden Run G. M. Co, N. L, The Dresden Gold Mines, Co, N. L. The Lady Evelyn G. Mines, Ltd | Coolgardie Chambers, Bayley Street, Coolgardie | 1897 | Witton's Directory |
| Oxman | A. | Ganger | Narrogin | 1897 | Witton's Directory |
| Oyasn | | Japanese Store | Shaw Street, Coolgardie | 1897 | Witton's Directory |
