Harnack is the surname of a German family of intellectuals, artists, mathematicians, scientists, theologians and those in other fields. Several family members were executed by the Nazis during the last years of the

Third Reich Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...

. * Theodosius Harnack (1817–1889), German theologian :*Anna Harnack (1849–?) :* Adolf von Harnack (1851–1930), German liberal theologian and historian of religion ::*Agnes von Zahn-Harnack (1884–1950), German writer and women's rights activist ::* Ernst von Harnack (1888–1945), German anti-Nazi resistance fighter :::* Gustav-Adolf von Harnack (1917-2010), German pediatrician ::* Elisabet von Harnack (1892–1976), German social worker ::*

Axel von Harnack Friedrich Hermann Julius Axel von Harnack (September 12, 1895 – June 17, 1974) was a German librarian, historian and philologist. He was the cousin of Arvid and Falk Harnack and worked to get Arvid and his wife, Mildred Harnack released from Naz ...

(1895–1974), German historian and philologist :*

Carl Gustav Axel Harnack Carl Gustav Axel Harnack (, Dorpat (now ) – 3 April 1888, Dresden) was a Baltic German mathematician who contributed to potential theory. Harnack's inequality applied to harmonic functions. He also worked on the real algebraic geometry of pla ...

(1851–1888), German mathematician :* Erich Harnack, professor of pharmacology :* Otto Harnack, literature historian ::* Clara Harnack, painter and wife of Otto :::* Arvid Harnack (1901–1942), German anti-Nazi resistance fighter ::::* Mildred Harnack (1902–1943), American anti-Nazi resistance fighter, wife of Arvid :::*

Falk Harnack Falk Harnack (2 March 1913 – 3 September 1991) was a German director and screenwriter. During Germany's Nazi era, he was also active with the German Resistance and toward the end of World War II, the partisans in Greece. Harnack was from a fam ...

(1913–1991), German anti-Nazi resistance fighter, film and stage director, brother of Arvid Harnack

Other uses

Harnack's principle In the mathematical field of partial differential equations, Harnack's principle or Harnack's theorem is a corollary of Harnack's inequality which deals with the convergence of sequences of harmonic functions. Given a sequence of harmonic functio ...

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