Residents of Mara — Sub-district G, surnames O (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 3 | oboyle | arthur | M | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 5 | oboyle | austin | M | 37 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 254 |
| 25 | oboyle | bridget | F | 45 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 9 | oboyle | catherine | F | 70 | Roman Catholic | Irish | Ireland | No Occupation Listed | 255 |
| 6 | oboyle | ellen | F | 34 | Roman Catholic | Irish | Ontario | No Occupation Listed | 254 |
| 1 | oboyle | john | M | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 4 | oboyle | lizzie | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 7 | oboyle | louisa | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 8 | oboyle | mary | F | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 254 |
| 8 | oboyle | mary | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 2 | oboyle | patrick | M | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 24 | oboyle | peter | M | 47 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 258 |
| 9 | oboyle | peter | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 5 | oboyle | rose | F | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 6 | oboyle | susan | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 258 |
| 7 | oboyle | walter | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 254 |
| 9 | obrien | dennis | M | 70 | Roman Catholic | Irish | Ireland | Teachers (unspecified) | 12 |
| 11 | obrien | george | M | 28 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 12 |
| 10 | obrien | mary | F | 60 | Roman Catholic | Irish | Ireland | No Occupation Listed | 12 |
| 20 | oconnell | catharine | F | 27 | Roman Catholic | Irish | Ontario | No Occupation Listed | 249 |
| 18 | oconnell | cornelius | M | 25 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 249 |
| 7 | oconnell | dennis | M | 26 | Roman Catholic | Irish | Ontario | Blacksmiths | 100 |
| 9 | oconnell | george | M | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 19 | oconnell | john | M | 29 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 249 |
| 8 | oconnell | nora | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 10 | oconnell | william | M | 1 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 11 | odell | henry | M | 43 | Anglican | Irish | Ireland | clerk of division court | 87 |
| 12 | odell | maggie | F | 26 | Anglican | Irish | Ontario | No Occupation Listed | 87 |
| 14 | odell | maggie | F | 11 | Anglican | Irish | Ontario | No Occupation Listed | 87 |
| 15 | odell | mannsell | M | 10 | Anglican | Irish | Ontario | No Occupation Listed | 87 |
| 13 | odell | thos | M | 14 | Anglican | Irish | Ontario | No Occupation Listed | 87 |
| 16 | odell | william | M | 7 | Anglican | Irish | Ontario | No Occupation Listed | 87 |
| 20 | odonnel | annie | F | 24 | Roman Catholic | Irish | Ontario | Servants nfs | 204 |
| 22 | odonnel | cecelia | F | 18 | Roman Catholic | Irish | Ontario | Servants nfs | 204 |
| 23 | odonnel | ellen | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 204 |
| 21 | odonnel | martin | M | 22 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 204 |
| 20 | odonnell | agnes | F | 6 | Roman Catholic | Irish | Ontario | No Occupation Listed | 210 |
| 11 | odonnell | anna | F | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 25 | odonnell | anne | F | 36 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 2 | odonnell | anthony | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 19 | odonnell | arthur | M | 10 | Roman Catholic | Irish | Ontario | No Occupation Listed | 210 |
| 18 | odonnell | austin | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 210 |
| 8 | odonnell | bridget | F | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 24 | odonnell | bridget | F | 45 | Roman Catholic | Irish | Ireland | No Occupation Listed | 208 |
| 4 | odonnell | catharine | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 2 | odonnell | catharine | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 12 | odonnell | catherine | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 6 | odonnell | catherine | F | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 10 | odonnell | daniel | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 3 | odonnell | dominid | M | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 1 | odonnell | donald | M | 25 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 23 | odonnell | donald | M | 60 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 208 |
| 16 | odonnell | edward | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 24 | odonnell | edward | M | 49 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 140 |
| 1 | odonnell | ellen | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 14 | odonnell | ellen | F | 23 | Roman Catholic | Irish | Ontario | No Occupation Listed | 210 |
| 15 | odonnell | francis | M | 21 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 210 |
| 17 | odonnell | fredrick | M | 0 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 2 | odonnell | johanna | F | 67 | Roman Catholic | Irish | Ireland | No Occupation Listed | 91 |
| 2 | odonnell | john | M | 21 | Roman Catholic | Irish | Ontario | No Occupation Listed | 100 |
| 5 | odonnell | john | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 1 | odonnell | john | M | 66 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 91 |
| 5 | odonnell | john | M | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 12 | odonnell | john | M | 50 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 210 |
| 9 | odonnell | josephine | F | 3 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 4 | odonnell | margaret | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 6 | odonnell | margaret | F | 19 | Roman Catholic | Irish | Ontario | Servants nfs | 208 |
| 17 | odonnell | margaret | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 210 |
| 9 | odonnell | mary | F | 38 | Roman Catholic | Irish | Ireland | No Occupation Listed | 99 |
| 13 | odonnell | mary | F | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 3 | odonnell | mary | F | 16 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 25 | odonnell | mary | F | 27 | Roman Catholic | Irish | Ontario | No Occupation Listed | 90 |
| 13 | odonnell | mary | F | 32 | Roman Catholic | Irish | Ireland | No Occupation Listed | 210 |
| 8 | odonnell | michael | M | 45 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 99 |
| 7 | odonnell | michael | M | 5 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 5 | odonnell | michael | M | 21 | Roman Catholic | Irish | Ontario | Labourers nfs | 208 |
| 10 | odonnell | patrick | M | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 1 | odonnell | patrick | M | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 140 |
| 7 | odonnell | patrick | M | 24 | Roman Catholic | Irish | Ontario | Lumberers and loggers | 208 |
| 4 | odonnell | peter | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 208 |
| 14 | odonnell | teresa | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 25 | odonnell | thomas | M | 28 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 208 |
| 16 | odonnell | thomas | M | 18 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 210 |
| 24 | odonnell | timothy | M | 27 | Roman Catholic | Irish | Ontario | Blacksmiths | 90 |
| 6 | odonnell | timothy | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 91 |
| 15 | odonnell | william | M | 7 | Roman Catholic | Irish | Ontario | No Occupation Listed | 99 |
| 3 | odonnell | william | M | 32 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 91 |
| 21 | odonohue | edward | M | 23 | Roman Catholic | Irish | Ontario | Hotel Keepers and Managers | 103 |
| 22 | odonohue | julia | F | 18 | Roman Catholic | French | Ontario | No Occupation Listed | 103 |
| 15 | oleary | arthur | M | 44 | Roman Catholic | Irish | United States | Farmers, general and nfs | 151 |
| 10 | oleary | bridget | F | 11 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 8 | oleary | bridget | F | 29 | Roman Catholic | Irish | Ontario | No Occupation Listed | 186 |
| 6 | oleary | elizabeth | F | 19 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 3 | oleary | florence | M | 45 | Roman Catholic | Irish | Ireland | Farmers, general and nfs | 200 |
| 11 | oleary | florence | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 18 | oleary | hanorah | F | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 151 |
| 19 | oleary | jeremiah | M | 9 | Roman Catholic | Irish | Ontario | No Occupation Listed | 151 |
| 4 | oleary | johanna | F | 45 | Roman Catholic | Irish | Ireland | No Occupation Listed | 200 |
| 5 | oleary | johanna | F | 21 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 9 | oleary | john | M | 4 | Roman Catholic | Irish | Ontario | No Occupation Listed | 186 |
| 8 | oleary | julia | F | 15 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 9 | oleary | margaret | F | 13 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 16 | oleary | mary | F | 14 | Roman Catholic | Irish | Ontario | No Occupation Listed | 151 |
| 7 | oleary | michael | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 200 |
| 10 | oleary | rose | F | 2 | Roman Catholic | Irish | Ontario | No Occupation Listed | 186 |
| 17 | oleary | sarah | F | 12 | Roman Catholic | Irish | Ontario | No Occupation Listed | 151 |
| 7 | oleary | timothy | M | 35 | Roman Catholic | Irish | Ontario | Farmers, general and nfs | 186 |
| 23 | oneil | andrew | M | 20 | Roman Catholic | Irish | Ontario | No Occupation Listed | 152 |
| 25 | oneil | francis | M | 17 | Roman Catholic | Irish | Ontario | No Occupation Listed | 152 |
| 20 | oneil | mary | F | 56 | Roman Catholic | Irish | Ireland | No Occupation Listed | 152 |
| 22 | oneil | mary | F | 22 | Roman Catholic | Irish | Ontario | No Occupation Listed | 152 |
| 21 | oneil | peter | M | 24 | Roman Catholic | Irish | Ontario | No Occupation Listed | 152 |
| 24 | oneil | sarah | F | 18 | Roman Catholic | Irish | Ontario | No Occupation Listed | 152 |
| 18 | ormsby | maria | F | 8 | Anglican | Irish | Ontario | No Occupation Listed | 80 |
| 20 | ormsby | thomas | M | 23 | Anglican | Irish | Ontario | Labourers nfs | 80 |
| 19 | ormsby | william | M | 6 | Anglican | Irish | Ontario | No Occupation Listed | 80 |
| 18 | orr | mary | F | 28 | Anglican | Irish | Ontario | No Occupation Listed | 127 |
| 17 | orr | william | M | 43 | Anglican | Irish | Ireland | Dealer, merchant etc. (Wholesale & retail trade) | 127 |