Independent Social Democratic Party politicians

Bernard Johann Heinrich Koenen (17 February 1889 – 30 April 1964) was a German politician.Between 1953 and 1958 he was the East German ambassador to Czechoslovakia.

Richard Müller (9 December 1880 – 11 May 1943) was a German socialist, metal worker, union shop steward, and later historian. Trained as a lathe-operator, Müller later became an industrial unionist and organizer of mass-strikes against World War I. In 1918 he was a leading figure of the council movement in the German Revolution. In the 1920s he wrote a three-volume history of the German Revolution.

Ernst Torgler (25 April 1893 – 19 January 1963) was the last chairman of the Communist Party of Germany (KPD) faction in the German Reichstag before he worked for the Nazis.

Frieda Rosenthal (born Frieda Schrinner: 9 June 1891 – 15 October 1936) was a Berlin local politician and, after 1933, active in resisting the Nazi régime. Concerned that, under interrogation, she had inadvertently implicated a fellow activist, she died by hanging herself, using a radiator, in her prison cell.

Gustav Ernst Hans Jendretzky (20 July 1897 – 2 July 1992) was a German Communist politician. He was a prominent politician of the Socialist Unity Party (SED) in the German Democratic Republic (East Germany).
He became a member of the Independent Social Democratic Party of Germany in 1919 and of the Communist Party of Germany (KPD) in 1920. In the 1920s, he was one of the most prominents members of the KPD, and was head of the Roter Frontkämpferbund in Berlin. He was a member of the Parliament of Prussia from 1928 to 1932. In 1934, he was sentenced to three years of prison, being charged with "conspiracy to commit high treason."After World War II, he became active in communist politics in the Soviet Occupation Zone, and was president of the Free German Trade Union Federation (FDGB) 1946-1948, First Secretary (head) of the East Berlin SED district from 1948 to 1953. He was a candidate to the politburo from 1950, deputy minister of the Interior from 1957 to 1960, a member of the SED central committee 1957-1989, member of the Volkskammer 1950-1954 and 1958-1989.
Jendretzky famously denounced the Freedom Bell in western Berlin, a gift from Americans as a sign of the fight against communism in Europe, as the "death bell", warning: "The rope of the death bell will become the gallows rope for those who ring it."

Max Fechner (27 July 1892 – 13 September 1973) was a German politician who served as Minister of Justice of East Germany from 1949 to 1953

Hulda Martha Arendsee (29 March 1885 – 22 May 1953) was a German politician (KPD) and women's rights activist.

Herta Geffke (married name, Herta Kaasch: 19 August 1893 – 29 December 1974) was a German activist and politician (KPD, SED) who resisted Nazism. After 1945 she became a member of the Party Central Control Commission (Zentrale Parteikontrollkommission / ZPKK) in the Soviet occupation zone (from 1949 the German Democratic Republic), identified as a "true Stalinist" and feared on account of her interrogation methods.

Mathilde Wurm (30 September 1874, Frankfurt am Main – 31 March or 1 April 1935) was a German politician, social worker and journalist. She represented the Social Democratic Party of Germany and the Independent Social Democratic Party of Germany in the Reichstag from 1920 to 1933.

Friedrich Wolf (23 December 1888 – 5 October 1953) was a German doctor and politically-engaged writer. From 1949 to 1951, he served as East Germany's first ambassador to Poland.