| Attestation(s) | Federated | Family Name | Given Names | Date of Birth | Place of Birth |
|
| Costello | Joseph Thomas | 1895-03-18 | Saint John, NB |
|
|
| Costello | Peter | 1896-09-20 | Saint John, NB |
|
|
| Costello | William | 1881-12-07 | Preston, England |
|
|
| Costello | William Joseph | 1879-04-05 | Boston, MA |