Residents of Arthur — Sub-district F, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 2 | obreth | andrew | M | 52 | Roman Catholic | German | Germany | Boot and shoemakers and repairers | 39 |
| 12 | obreth | andrew | M | 4 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 10 | obreth | caroline | F | 9 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 11 | obreth | edmond | M | 6 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 9 | obreth | eleanor | F | 11 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 3 | obreth | elizabeth | F | 49 | Roman Catholic | German | Germany | No Occupation Listed | 39 |
| 4 | obreth | elizabeth | F | 27 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 1 | obreth | frank | M | 25 | Roman Catholic | German | Ontario | Farmers, general and nfs | 38 |
| 7 | obreth | gregory | M | 13 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 6 | obreth | heremon | M | 15 | Roman Catholic | German | Ontario | Boot and shoemakers and repairers | 39 |
| 5 | obreth | matilda | F | 18 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 8 | obreth | teresa | F | 12 | Roman Catholic | German | Ontario | No Occupation Listed | 39 |
| 17 | obrien | anne | F | 21 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 16 | obrien | bridget | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 2 | obrien | catharine | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 73 |
| 13 | obrien | catherine | F | 54 | Roman Catholic | Irish | Ireland | No Occupation Listed | 277 |
| 21 | obrien | catherine | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 4 | obrien | charles | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 73 |
| 24 | obrien | jane | F | 45 | Roman Catholic | Irish | Ireland | No Occupation Listed | 73 |
| 23 | obrien | john | M | 45 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 73 |
| 3 | obrien | john | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 73 |
| 19 | obrien | john | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 25 | obrien | margaret | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 73 |
| 15 | obrien | margaret | F | 25 | Roman Catholic | Irish | Ontario | Servants nfs | 277 |
| 14 | obrien | mary | F | 29 | Roman Catholic | Irish | Ontario | Servants nfs | 277 |
| 12 | obrien | michael | M | 60 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 277 |
| 20 | obrien | michael | M | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 18 | obrien | patrick | M | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 1 | obrien | thomas | M | 18 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 73 |
| 22 | obrien | thomas | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 277 |
| 24 | oconnele | bridget | F | 50 | Roman Catholic | Irish | Ireland | No Occupation Listed | 247 |
| 23 | oconnele | james | M | 50 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 247 |
| 25 | oconnele | mary | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 247 |
| 25 | oconner | catherine | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 266 |
| 3 | oconner | daniel | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 266 |
| 4 | oconner | john | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 266 |
| 6 | oconner | john | M | 24 | Roman Catholic | Irish | Ireland | No Occupation Listed | 267 |
| 2 | oconner | margaret | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 266 |
| 1 | oconner | mary | F | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 266 |
| 24 | oconner | thomas | M | 35 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 266 |
| 10 | oconnor | bridget | F | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 184 |
| 21 | oconnor | catherine | F | 28 | Roman Catholic | Irish | Ontario | Seamstress | 124 |
| 6 | oconnor | catherine | F | 44 | Roman Catholic | Irish | Ireland | No Occupation Listed | 177 |
| 9 | oconnor | catherine | F | 42 | Roman Catholic | Irish | Ireland | No Occupation Listed | 184 |
| 4 | oconnor | christopher | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 24 | oconnor | daniel | M | 37 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 124 |
| 12 | oconnor | daniel | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 184 |
| 25 | oconnor | edward | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 23 | oconnor | elisabeth | F | 27 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 5 | oconnor | elisabeth | F | 61 | Roman Catholic | Irish | Ireland | No Occupation Listed | 267 |
| 14 | oconnor | elisabith | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 184 |
| 22 | oconnor | ellen | F | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 124 |
| 7 | oconnor | ellen | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 5 | oconnor | francis | M | 53 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 177 |
| 10 | oconnor | francis | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 8 | oconnor | james | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 23 | oconnor | john | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 124 |
| 9 | oconnor | john | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 11 | oconnor | john | M | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 184 |
| 24 | oconnor | john | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 19 | oconnor | margaret | F | 66 | Roman Catholic | Irish | Ireland | No Occupation Listed | 124 |
| 20 | oconnor | margaret | F | 32 | Roman Catholic | Irish | Ontario | Seamstress | 124 |
| 1 | oconnor | mary | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 13 | oconnor | michael | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 184 |
| 2 | oconnor | nicholas | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 8 | oconnor | patrick | M | 45 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 184 |
| 15 | oconnor | patrick | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 184 |
| 11 | oconnor | peter | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 177 |
| 3 | oconnor | silvester | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 187 |
| 18 | oconnor | thomas | M | 84 | Roman Catholic | Irish | Ireland | No Occupation Listed | 124 |
| 25 | oconnor | thomas | M | 24 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 124 |
| 22 | oconnor | timothy | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 187 |
| 11 | odonnel | james | M | 64 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 146 |
| 13 | odonnel | james | M | 23 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 146 |
| 15 | odonnel | johanna | F | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 146 |
| 12 | odonnel | john | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 146 |
| 14 | odonnel | margaret | F | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 146 |
| 10 | odonnell | bridget | F | 29 | Roman Catholic | Irish | Ontario | No Occupation Listed | 121 |
| 4 | odonnell | catherine | F | 33 | Roman Catholic | Irish | Ontario | No Occupation Listed | 103 |
| 11 | odonnell | daniel | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 9 | odonnell | elisa | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 14 | odonnell | ellen | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 121 |
| 12 | odonnell | ellen | F | 31 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 19 | odonnell | ellen | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 24 | odonnell | ellen | F | 33 | Roman Catholic | Irish | Ireland | No Occupation Listed | 278 |
| 6 | odonnell | ellen | F | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 16 | odonnell | hannah | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 1 | odonnell | hanora | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 9 | odonnell | james | M | 38 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 121 |
| 12 | odonnell | james | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 121 |
| 20 | odonnell | james | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 25 | odonnell | james | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 14 | odonnell | john | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 5 | odonnell | john | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 103 |
| 23 | odonnell | john | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 278 |
| 2 | odonnell | john | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 9 | odonnell | magaret | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 103 |
| 19 | odonnell | margaret | F | 81 | Roman Catholic | Irish | Ireland | No Occupation Listed | 195 |
| 17 | odonnell | margaret | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 4 | odonnell | margaret | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 13 | odonnell | mary | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 121 |
| 13 | odonnell | mary | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 6 | odonnell | mary | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 103 |
| 5 | odonnell | mary | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 10 | odonnell | maurice | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 53 |
| 11 | odonnell | michael | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 121 |
| 15 | odonnell | michael | M | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 3 | odonnell | michael | M | 36 | Roman Catholic | Irish | Ontario | Dealer, merchant etc. (Wholesale & retail trade) | 103 |
| 3 | odonnell | michael | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 278 |
| 7 | odonnell | patrick | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 103 |
| 8 | odonnell | thomas | M | 27 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 53 |
| 11 | odonnell | thomas | M | 43 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 100 |
| 18 | odonnell | thomas | M | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 8 | odonnell | thomas | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 103 |
| 20 | ogden | john | M | 82 | Anglican | English | Quebec | Farmers, general and nfs | 61 |
| 21 | ogden | mary | F | 35 | Anglican | Irish | Ontario | No Occupation Listed | 61 |
| 22 | ogden | maurice | M | 4 | Anglican | English | Ontario | No Occupation Listed | 61 |
| 11 | ohara | agnes | F | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 5 | ohara | arthur | M | 40 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 74 |
| 9 | ohara | bridget | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 21 | ohara | catharine | F | 46 | Roman Catholic | Irish | Ireland | No Occupation Listed | 196 |
| 6 | ohara | ellen | F | 31 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 12 | ohara | ellen | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 24 | ohara | frank | M | 17 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 196 |
| 20 | ohara | john | M | 43 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 196 |
| 8 | ohara | mary | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 23 | ohara | mary | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 196 |
| 7 | ohara | oliver | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 25 | ohara | patrick | M | 16 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 196 |
| 1 | ohara | simon | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 196 |
| 22 | ohara | thomas | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 196 |
| 10 | ohara | william | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 74 |
| 17 | oneill | hugh | M | 13 | Anglican | English | England | Servants nfs | 250 |
| 17 | oreilly | edward | M | 35 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 31 |
| 20 | oreilly | elizabeth | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 31 |
| 21 | oreilly | eugene | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 31 |
| 19 | oreilly | john | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 31 |
| 18 | oreilly | margaret | F | 30 | Roman Catholic | Irish | Ontario | No Occupation Listed | 31 |
| 8 | osullivan | catharine | F | 29 | Roman Catholic | Irish | Ontario | No Occupation Listed | 117 |
| 6 | osullivan | edward | M | 27 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 117 |
| 9 | osullivan | george | M | 23 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 117 |
| 4 | osullivan | jeremiah | M | 64 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 117 |
| 12 | osullivan | jeremiah | M | 16 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 117 |
| 5 | osullivan | maria | F | 59 | Roman Catholic | Irish | Ireland | No Occupation Listed | 117 |
| 11 | osullivan | richard | M | 19 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 117 |
| 10 | osullivan | robert | M | 21 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 117 |
| 7 | osullivan | sarah | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 117 |
| 20 | ovans | victoria | F | 15 | Presbyterian | Irish | Ontario | No Occupation Listed | 230 |
| 23 | owens | bridget | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 6 | owens | catherine | F | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 5 | owens | jane | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 1 | owens | john | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 8 | owens | joseph | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 25 | owens | margaret | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 22 | owens | mary | F | 38 | Roman Catholic | Irish | Ireland | No Occupation Listed | 253 |
| 24 | owens | mary | F | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 2 | owens | michael | M | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 21 | owens | patrick | M | 52 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 253 |
| 7 | owens | patrick | M | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 4 | owens | thomas | M | 8 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |
| 3 | owens | toresa | F | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 253 |