Family: Hackmann, Gerhard Wilhelm / Knapheide, Maria Friederika (F1547)
m. 31 Mar 1887Hackmann, Johann Heinrich (1843-1920) 
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Büscher, Sophia Louise (1847-1917)
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Hackmann, Emma Sophia (1867-1942)  |
| Hackmann, Ernst Samuel (1870- ) |
| Hackmann, Maria Martha (1872- ) |
| Hackmann, Johann Heinrich (1874-1874) |
| Hackmann, Maria Louise (1875- ) |
| Hackmann, Julia Amanda (1879-1968) |
| Hackmann, Heinrich Martin (1881-1955) |
| Hackmann, Friedrich Daniel (1884-1950) |
| Hackmann, Rudoph Florenz (1887-1887) |
| Hackmann, August Arthur (1888-1894) |
| Knapheide, Ernst Wilhelm (1821-1886) |
| Kalmerten, Maria Sophia Elisabeth (1824-1890) |
| Knapheide, Friedrich Wilhelm (1849-1919) |
| Knapheide, Anna Sophia (1851-1920) |
| Knapheide, Bernhardine Caroline (1853-1906) |
| Knapheide, Ernst Heinrich (1856-1918) |
| Knapheide, Friedrika Wilhelmina (1859-1922) |
| Knapheide, Friederike Louise (1861-1884) |
| Knapheide, Ernst Wilhelm (1864-1944) |
| Hackmann, Gerhard Wilhelm (1866-1931)
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| Knapheide, Maria Friederika (1867-1939)
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| Hackmann, Hugo Heinrich (1888- ) |
| Hackmann, Annette Louise (1890- ) |
| Hackmann, Otto Friedrich Wilhelm (1893-1969) |
| Hackmann, Emma Meta (1896- ) |
| Hackmann, Arthur Wilhelm (1899- ) |
| Hackmann, Clarence Heinrich (1901-1922) |
| Hackmann, Heinrich Samuel (1903- ) |
| Hackmann, Wilhelm Lawrence (1906-1981) |
| Hackmann, Edna Maria (1908-1988) |