| OGrady | M. | Master Mariner | Fremantle | 1882 | WA Almanack |
| OGrady | Mrs. | Dressmaker | Fremantle | 1875 | WA Almanack |
| OGrady | Mrs. | Dressmaker | Fremantle | 1877 | WA Almanack |
| OGrady | Robert | Grazier | Murchison, Gascoyne &c. (Murchison, Etc.) | 1884 | WA Almanack |
| OGrady | Robert | Grazier | Murchison & Gascoyne (Murchison, Etc) | 1886 | WA Almanack |
| OGrady | Robert | Grazier | Murchison, Etc. | 1889 | WA Almanack |
| OGrady | T. | Master Mariner | Fremantle | 1869 | WA Almanack |
| OGrady | T. | Master Mariner | Fremantle | 1870 | WA Almanack |
| OGrady | Thos. | Grazier | Murchison, Gascoyne &c. (Murchison, Etc.) | 1884 | WA Almanack |
| OGrady | Thos. | Grazier | Murchison & Gascoyne (Murchison, Etc) | 1886 | WA Almanack |
| OGrady | Thos. | Grazier | Murchison, Etc. | 1889 | WA Almanack |
| Ohadwick | H. | Clerk of Court & Sandalwood Cutter | Greenough | 1885 | Herald Almanack |
| OHanlon | H. | Tailor | Fremantle | 1881 | WA Almanack |
| OHara | Jos. | Police Constable | York | 1884 | WA Almanack |
| OHara | M. | Miner | Victoria District (Northampton) | 1884 | WA Almanack |
| OHara | M. | Miner | Northampton | 1889 | WA Almanack |
| Ohara | W. | Miner | Stirling Street, Perth | 1897 | Witton's Directory |
| OHare | M. | Miner | Victoria District (Northampton) | 1880 | WA Almanack |
| OHerne | P. | Purser | Fremantle | 1877 | WA Almanack |
| Ohlsen | Jos J. & Co. | Tailors | Howick Street, Perth | 1897 | Witton's Directory |
| Ohlsen | Jos J. & Co. | Tailors (workroom) | Perth Club Chambers, 57, Howick Street, Perth | 1897 | Witton's Directory |
| Ohnesorgen | F. | Carpenter | King Street, Coolgardie | 1897 | Witton's Directory |
| OKeef | D. | Overseer P. & O. Co.s Coal Wharf | Albany | 1874 | WA Almanack |
| OKeef | D. | Farmer | Northam | 1875 | WA Almanack |
| OKeef | Denis | Carter | Albany | 1872 | WA Almanack |
| OKeef | Denis | Carter | Albany | 1873 | WA Almanack |
| OKeefe | - | Light Keeper | Albany | 1870 | WA Almanack |
| OKeefe | D. | Labourer | Albany | 1880 | WA Almanack |
| OKeefe | D. | Labourer | Albany | 1884 | WA Almanack |
| OKeefe | D. | Farmer | Northam | 1889 | WA Almanack |
| OKeefe | D. | Foreman P & O Agency | Albany | 1889 | WA Almanack |
| OKeefe | E. | Clerk | Albany | 1889 | WA Almanack |
| OKeefe | M. | Farmer | Northam | 1881 | WA Almanack |
| OKeese | D. | Farmer | Northam | 1886 | WA Almanack |
| Okely | A,. Jr. | Dairyman | Wanneroo | 1887 | WA Almanack |
| Okely | A. | Farmer | Wanneroo (Carine) | 1881 | WA Almanack |
| Okely | A. | Farmer | Wanneroo (Carine) | 1882 | WA Almanack |
| Okely | A. | Farmer | Wanneroo (Cairne) | 1884 | WA Almanack |
| Okely | A. | Farmer | Wanneroo | 1886 | WA Almanack |
| Okely | A. | Dairyman | Wanneroo | 1887 | WA Almanack |
| Okely | A. | Dairyman | Wanneroo | 1888 | WA Almanack |
| Okely | A. | Dairyman | Wanneroo | 1889 | WA Almanack |
| Okely | A. jnr. | Dairyman | Wanneroo | 1889 | WA Almanack |
| Okely | A. Jr. | Dairyman | Wanneroo | 1888 | WA Almanack |
| Okely | Alex | | Bulwer Street, Perth | 1897 | Witton's Directory |
| Okely | Alfred | Gardener | Perth | 1869 | WA Almanack |
| Okely | Alfred | Gardener | Perth | 1870 | WA Almanack |
| Okely | E. | Coach Painter | Perth | 1889 | WA Almanack |
| Okely | F. | Carriage Painter | Perth | 1884 | WA Almanack |
| Okely | H. | Barman | Northampton | 1888 | WA Almanack |
