Residents of Watford, VL — Sub-district J, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 11 | obrien | john | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 105 |
| 9 | obrien | m | M | 44 | Roman Catholic | Irish | Ontario | Coach, carriage, cart and wagon makers | 105 |
| 10 | obrien | mary | F | 34 | Roman Catholic | Irish | Ontario | No Occupation Listed | 105 |
| 13 | obrien | michael | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 105 |
| 14 | obrien | patrick | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 105 |
| 15 | obrien | sarah | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 105 |
| 12 | obrien | zepherine | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 105 |
| 5 | odwell | adda | F | 18 | Roman Catholic | Irish | Ireland | Servants nfs | 101 |
| 3 | odwell | ann | F | 40 | Roman Catholic | Irish | Ireland | No Occupation Listed | 101 |
| 8 | odwell | anna | F | 12 | Roman Catholic | Irish | Ireland | No Occupation Listed | 101 |
| 4 | odwell | dann | M | 20 | Roman Catholic | Irish | Ireland | Blacksmiths | 101 |
| 9 | odwell | edward | M | 9 | Roman Catholic | Irish | Not Mapped | No Occupation Listed | 101 |
| 12 | odwell | h | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 101 |
| 7 | odwell | hannorah | F | 14 | Roman Catholic | Irish | Ireland | No Occupation Listed | 101 |
| 6 | odwell | kathren | F | 17 | Roman Catholic | Irish | Ireland | No Occupation Listed | 101 |
| 10 | odwell | margeat | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 101 |
| 11 | odwell | michal | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 101 |
| 2 | odwell | stephen | M | 37 | Roman Catholic | Irish | Ireland | Stone carvers or cutters and stone yard workers | 101 |
| 25 | oneil | anna | F | 2 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 63 |
| 21 | oneil | j | M | 40 | Wesleyan Methodist | Irish | Ontario | Insurance Salesmen and agent | 63 |
| 22 | oneil | kate | F | 33 | Wesleyan Methodist | English | England | No Occupation Listed | 63 |
| 24 | oneil | laura | F | 5 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 63 |
| 23 | oneil | lucille | F | 7 | Wesleyan Methodist | Irish | Ontario | No Occupation Listed | 63 |