| Name | Birth Year | Birth Place |
| Alfred Frederick Day | 1875 | Islington, London, England |
| Alfred George Day | 1906 | West Ham, Essex, England |
| Catharine Day | 1880 | Poplar, Middlesex, England |
| Doris Edna Day | 1916 | West Ham, Essex, England |
| Grace Margaret Day | 1907 | West Ham, Essex, England |
| Irene Rose Day | 1920 | West Ham, Essex, England |
| John Joseph Day | 1912 | West Ham, Essex, England |
| Joseph Patrick Day | 1914 | West Ham, Essex, England |
| Kathleen Molly Day | 1905 | West Ham, Essex, England |
| Lucy Edith Day | 1910 | West Ham, Essex, England |
| Sidney Walter George Day | 1918 | West Ham, Essex, England |
| Address | Unknown |
| Parish | West Ham |
| Registration District | West Ham |
| County | Essex, London |
Source: findmypast - 1921 Census