Prairie County, MT
Last Updated: 01 April 2021
Prairie County, MT
Last Updated: 01 April 2021
Prairie County Residents
| Last Name | First Name | Link |
| O'Connor | Thomas | 1868-1941 |
| O'Neil | Annie Lillian Tularski Wayne | 1909-2002 |
| O'Neil | Edwin Thomas | 1876-1958 |
| O'Neil | Michael Francis | 1908-1985 |
| O'Neill | Dianne Mary Undem | 1940-2015 |
| O'Neill | Frank Maurice | 1935-2020 |
| Odegard | Fern Alice Hardy Brewster | 1905-1979 |
| Odegard | Harry Maynard | 1892-1973 |
| Odegard | Karoline Mathilda Erie | 1861-1952 |
| Odekirk | Olando | Link |
| Odekirk | Orlando | Link |
| Older | Burton V | Link |
| Older | Edward Phillip | Link |
| Older | Inez T Hodgman | Link |
| Older | Madge J | Link |
| Olson | Charles O | Link |
| Olson | Elizabeth Rahn | Link |
| Olson | Elsie | Link |
| Olson | Esther Ruth | Link |
| Olson | George Henry August | Link |
| Olson | Hilda S | Link |
| Olson | Jennie Alexandra | Link |
| Olson | Lorena Morast | Link |
| Olson | Olando "Ole" | Link |
| Olson | Olando C | Link |
| Olson | Orrin George | Link |
| Olson | Richard | Link |
| Opp | Christian L | 1892-1956 |
| Opp | Lydia Koschel | 1900-1955 |
| Orward | Harry | Link |
| Otis | Alice May Barnes | Link |
| Otis | Harrison Grey | Link |
| Otis | Katherine Evangeline Grady | Link |
| Owens | (baby) | Link |
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