Residents of St. Henri de Mascouche — Sub-district B, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 9 | iannois | andre | M | 11 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 15 | iannois | anna | F | 12 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 12 | iannois | celina | F | 30 | Roman Catholic | French | Quebec | No Occupation Listed | 14 |
| 1 | iannois | charlotte | F | 71 | Roman Catholic | French | Quebec | No Occupation Listed | 16 |
| 15 | iannois | delia | F | 3 | Roman Catholic | French | Quebec | No Occupation Listed | 14 |
| 10 | iannois | didas | M | 52 | Roman Catholic | French | Quebec | Day labourers (e.g journalier) | 18 |
| 14 | iannois | domithilde | F | 10 | Roman Catholic | French | Quebec | No Occupation Listed | 14 |
| 14 | iannois | eliza | F | 17 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 18 | iannois | elmina | F | 5 | Roman Catholic | French | Quebec | No Occupation Listed | 15 |
| 7 | iannois | emma | F | 15 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 24 | iannois | franse | M | 51 | Roman Catholic | French | Quebec | No Occupation Listed | 25 |
| 17 | iannois | heloise | F | 29 | Roman Catholic | French | Quebec | No Occupation Listed | 15 |
| 2 | iannois | j | M | 47 | Roman Catholic | French | Quebec | Day labourers (e.g journalier) | 17 |
| 5 | iannois | jean | M | 20 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 16 | iannois | joseph | M | 32 | Roman Catholic | French | Quebec | Day labourers (e.g journalier) | 15 |
| 6 | iannois | joseph | M | 18 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 12 | iannois | joseph | M | 20 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 4 | iannois | julienne | F | 21 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 9 | iannois | louis | M | 67 | Roman Catholic | French | Quebec | Farmers, general and nfs | 8 |
| 13 | iannois | lucreca | F | 28 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 11 | iannois | malvina | F | 23 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 8 | iannois | maria | F | 13 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 13 | iannois | marie | F | 11 | Roman Catholic | French | Quebec | No Occupation Listed | 14 |
| 19 | iannois | marie | F | 3 | Roman Catholic | French | Quebec | No Occupation Listed | 15 |
| 25 | iannois | marie | F | 53 | Roman Catholic | French | Quebec | No Occupation Listed | 25 |
| 13 | iannois | migel | M | 19 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 12 | iannois | octavie | F | 19 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 16 | iannois | pierre | M | 10 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 11 | iannois | sophronia | F | 48 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 10 | iannois | ulrie | M | 15 | Roman Catholic | French | Quebec | No Occupation Listed | 8 |
| 11 | iannois | william | M | 35 | Roman Catholic | French | Quebec | Day labourers (e.g journalier) | 14 |
| 17 | iannois | zenon | M | 8 | Roman Catholic | French | Quebec | No Occupation Listed | 18 |
| 20 | iannois | zephirine | F | 2 | Roman Catholic | French | Quebec | No Occupation Listed | 15 |
| 3 | iannois | zethe | F | 49 | Roman Catholic | French | Quebec | No Occupation Listed | 17 |
| 13 | inahaise | joseph | M | 26 | Roman Catholic | French Canadian | Canada | Day labourers (e.g journalier) | 82 |