| Name | Birth Year | Birth Place |
| Albert A Knapp | 1919 | Hackney, London, England |
| Edith Knapp | 1909 | Hackney, London, England |
| Florence E Knapp | 1881 | Finsbury, London, England |
| Frank Knapp | 1911 | Hackney, London, England |
| Frederick C Knapp | 1878 | Hackney, London, England |
| Frederick C Knapp | 1905 | Hackney, London, England |
| Lilian G Knapp | 1903 | Hackney, London, England |
| Thomas Knapp | 1918 | Hackney, London, England |
| Address | 44 Blackstone Road |
| Parish | Hackney |
| Registration District | Hackney |
| County | London, Middlesex |
Source: findmypast - 1921 Census