Residents of Fredericksburgh S — Sub-district F, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 17 | oconner | annie | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 18 | oconner | dennis | M | 27 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 5 |
| 19 | oconner | eliza | F | 35 | Roman Catholic | Irish | Ontario | No Occupation Listed | 5 |
| 15 | oconner | mary | F | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 4 |
| 16 | oconner | mary | F | 26 | Roman Catholic | Irish | Ontario | No Occupation Listed | 4 |
| 14 | oconner | michael | M | 63 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 4 |