Residents of Arran — Sub-district B, surnames U (1881 Census)
| # | Surname | Given | Sex | Age | Religion | Origin | Birthplace | Occupation | HH |
| 3 | underwood | andrew | M | 58 | Methodist | Irish | Ireland | Farmers, general and nfs | 235 |
| 4 | underwood | andrew | M | 12 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 6 | underwood | catherine | F | 20 | Methodist | Irish | Ontario | No Occupation Listed | 235 |
| 6 | underwood | charles | M | 3 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 11 | underwood | elizabeth | F | 22 | Methodist | Irish | Ontario | No Occupation Listed | 85 |
| 4 | underwood | elizabeth | F | 59 | Methodist | Irish | Ireland | No Occupation Listed | 235 |
| 5 | underwood | elizabeth | F | 22 | Methodist | Irish | Ontario | No Occupation Listed | 235 |
| 12 | underwood | ellen | F | 17 | Methodist | Irish | Ontario | No Occupation Listed | 85 |
| 9 | underwood | ellen | F | 15 | Methodist | Irish | Ontario | No Occupation Listed | 235 |
| 13 | underwood | isabella | F | 20 | Methodist | Irish | Ontario | No Occupation Listed | 85 |
| 7 | underwood | isabella | F | 19 | Methodist | Irish | Ontario | No Occupation Listed | 235 |
| 9 | underwood | james | M | 61 | Methodist | Irish | Ireland | Farmers, general and nfs | 85 |
| 1 | underwood | jane | F | 19 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 8 | underwood | john | M | 17 | Methodist | Irish | Ontario | No Occupation Listed | 235 |
| 2 | underwood | mabel | F | 1 | Methodist | Irish | Ontario | No Occupation Listed | 234 |
| 10 | underwood | mary | F | 54 | Methodist | Irish | Ireland | No Occupation Listed | 85 |
| 1 | underwood | mary | F | 21 | Methodist | English | Ontario | No Occupation Listed | 234 |
| 25 | underwood | mary | F | 39 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 5 | underwood | mary | F | 6 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 2 | underwood | matilda | F | 17 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 25 | underwood | thomas | M | 29 | Methodist | Irish | Ontario | Farmers, general and nfs | 234 |
| 3 | underwood | thomas | M | 15 | Methodist | Irish | Ontario | No Occupation Listed | 266 |
| 14 | underwood | william | M | 12 | Methodist | Irish | Ontario | No Occupation Listed | 85 |
| 24 | underwood | wm | M | 52 | Methodist | Irish | Ireland | Farmers, general and nfs | 266 |