Residents of Longueuil, Town—Ville — Sub-district A, surnames I (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 12 | iodoin | abina | F | 8 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 6 | iodoin | alexandre | M | 20 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 9 | iodoin | antoinette | F | 14 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 7 | iodoin | arthur | M | 18 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 10 | iodoin | emeline | F | 10 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 11 | iodoin | ernest | M | 9 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 5 | iodoin | eudosie | F | 43 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 8 | iodoin | eugene | M | 15 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 4 | iodoin | j | M | 44 | Roman Catholic | French | Quebec | avocat | 40 |
| 14 | iodoin | maria | F | 5 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 13 | iodoin | oscar | M | 6 | Roman Catholic | French | Quebec | No Occupation Listed | 40 |
| 3 | iodois | alexilda | F | 21 | Roman Catholic | French | Quebec | No Occupation Listed | 207 |
| 2 | iodois | ferdinand | M | 37 | Roman Catholic | French | Quebec | Manufacturers | 207 |