Konstantin "Kostja" Zetkin (14 April 1885 – September 1980) was a German physician, social economist and political activist.[1]
He was the son of Clara Zetkin, an iconic pioneer of the political left in Germany. For a time, he became the lover of another, Rosa Luxemburg.[2]
^"Findbuch Q1/59". Über die Familie Mayer, deren Familienunterlagen im vorliegenden Bestand zum Teil verwahrt werden...Da der Bestand zu einem wesentlichen Teil aus Briefen von Clara Zetkin und deren Sohn Konstantin (Kostja) Zetkin an die Familie Mayer besteht, soll auch kurz auf Clara Zetkin und deren Sohn eingegangen werden... Landesarchiv Baden-Württemberg, Stuttgart. December 2008. Retrieved 11 September 2017.
^Jörn Schütrumpf (2 January 2013). "Nicht gegen Russland". Clara Zetkin und die Kommunistische Internationale. Neues Deutschland, Berlin. Retrieved 11 September 2017.
Konstantin "Kostja" Zetkin (14 April 1885 – September 1980) was a German physician, social economist and political activist. He was the son of Clara Zetkin, an...
Russian-Jewish Ossip Zetkin [de], a devoted Marxist, with whom she had two sons, Maxim and Konstantin (known as Kostja). Ossip Zetkin became severely ill...
to Ossip and Clara Zetkin. Two years later his younger brother Kostja was born. After attending a high school in Stuttgart, Zetkin studied medicine in...
Luise Kautsky in 1909 Rosa Luxemburg and KostjaZetkin in 1909 Portrait of Rosa Luxemburg in 1910 Clara Zetkin and Rosa Luxemburg in 1910 In August 1914...
1986 Operation Dead End [de] Les Nikolai Müllerschön Rosa Luxemburg KostjaZetkin Margarethe von Trotta Väter und Söhne – Eine deutsche Tragödie Max Bernheim...
Yugoslavia who was living in Berlin. He was introduced to KostjaZetkin whose mother, Clara Zetkin, despite having herself been recently been excluded from...