Residents of St. Léonard — Sub-district J, surnames M (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 5 | marcous | albert | M | 8 | Roman Catholic | French | United States | No Occupation Listed | 219 |
| 4 | marcous | alesine | F | 36 | Roman Catholic | English | Quebec | No Occupation Listed | 219 |
| 6 | marcous | blanche | F | 2 | Roman Catholic | French | United States | No Occupation Listed | 219 |
| 7 | marcous | cordelia | F | 1 | Roman Catholic | French | United States | No Occupation Listed | 219 |
| 24 | marier | adelard | M | 1 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 21 | marier | agnes | F | 25 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 22 | marier | henrie | M | 6 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 20 | marier | jules | M | 37 | Roman Catholic | French | Quebec | Farmers, general and nfs | 8 |
| 23 | marier | orpha | F | 4 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 1 | martin | cordelia | F | 2 | Roman Catholic | French | Quebec | No Occupation Listed | 217 |
| 23 | martin | elie | M | 34 | Roman Catholic | French | Quebec | Professional engineer, specialisation unknown | 217 |
| 24 | martin | helena | F | 27 | Roman Catholic | English | Quebec | No Occupation Listed | 217 |
| 25 | martin | henry | M | 4 | Roman Catholic | French | Quebec | No Occupation Listed | 217 |
| 2 | martin | sovilina | F | 0 | Roman Catholic | French | Quebec | No Occupation Listed | 217 |
| 15 | mccarthy | julia | F | 63 | Roman Catholic | Irish | Ireland | No Occupation Listed | 174 |
| 17 | melaneau | angelina | F | 7 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 15 | melaneau | celina | F | 17 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 19 | melaneau | elizabeth | F | 4 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 13 | melaneau | johnny | M | 20 | Roman Catholic | French | Quebec | Labourers nfs | 7 |
| 14 | melaneau | joseph | M | 18 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 18 | melaneau | maria | F | 6 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 11 | melaneau | marie | F | 47 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 12 | melaneau | philomene | M | 22 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 16 | melaneau | rosanna | F | 10 | Roman Catholic | French | Quebec | No Occupation Listed | 7 |
| 10 | melaneau | thelesphore | M | 46 | Roman Catholic | French | Quebec | Other production and related workers nec | 7 |
| 17 | middleton | adelina | F | 18 | Roman Catholic | French | Quebec | No Occupation Listed | 175 |
| 16 | middleton | henry | M | 25 | Presbyterian | English | Ontario | Day labourers (e.g journalier) | 175 |
| 25 | monthloisir | guilloume | M | 27 | Roman Catholic | French | Quebec | Farmers, general and nfs | 152 |
| 17 | montplaiser | leon | M | 31 | Roman Catholic | French | United States | Coach, carriage, cart and wagon makers | 209 |
| 16 | morin | narcisse | M | 55 | Roman Catholic | French | Quebec | Boot and shoemakers and repairers | 208 |
| 14 | morisson | mary | F | 11 | Roman Catholic | English | Quebec | No Occupation Listed | 215 |