Käthe Cohnstädt, b: 1892 -

^{1922 USSR formed by Soviet states}
^{1939 - 1945 World War II}
^{1945 Atomic bomb detonated (Hiroshima)}
^{1950 Korean War begins}
^{1964 - 1973 Vietnam War}

^{1895 Marconi invents wireless telegraphy}
^{1899 Boer War begins}
^{1903 Wright brothers 1st plane flight}
^{1912 Titanic sinks on maiden voyage}
^{1914 - 1918 World War I}

^{1830 French Revolution}
^{1837 Queen Victoria assumes throne}
^{1854 Crimean War with Russia}
^{1869 Opening of Suez Canal}
^{1871 Franco - Prussian War}




	^Arno Klemm^b.1886 d.

^{Horst Günter Klemm}^b.1920 d.

^{Arno Wolfgang Klemm}^b.1925 d.

		^{Paul Cohnstädt}^{b.1852 d.1926}

	^{Käthe Cohnstädt}^b.1892 d.		^{Valentin Mühsam}^{b.1826 d.1897 Schweidnitz, Poland}

		^{Anna Mühsam}^b.1855 d.	^{Bertha Bielschowsky}^{b.1829 d.1911 Schweidnitz, Poland}