| | August Robert Kosak 1871–1927 | | |
| | Johann Hermann Kosak 1873–1952 Justine Philipp 1869–1922 | | |
| | Henriette Bertha Kosak 1877–1941 Andreas Johann Gross 1873–1925 | | |
| | Gustav Albert Kosak 1879–1918 Auguste Friederike Zansinger 1889– | | |
| | Helene Martha Kosak 1881–1936 Julius Albert Kehler 1879–1958 | | |
| | Wilhelmine Henriette Kosak 1886–1967 Adolf Peter Kissner 1880–1911 Joseph Benjamin Momberg 1872–1940 | | |
| | Henriette Wilhelmine Dalchau 1839–1922 | | |