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.
Theodosius Harnack (1817–1889), German theologianAnna Harnack (1849–?)Adolf von Harnack (1851–1930), German liberal theologian and historian of religionAgnes von Zahn-Harnack (1884–1950), German writer and women's rights activistErnst von Harnack (1888–1945), German anti-Nazi resistance fighterGustav-Adolf von Harnack (1917-2010), German pediatricianElisabet von Harnack (1892–1976), German social workerAxel von Harnack (1895–1974), German historian and philologistCarl Gustav Axel Harnack (1851–1888), German mathematicianErich Harnack, professor of pharmacologyOtto Harnack, literature historianClara Harnack, painter and wife of OttoArvid Harnack (1901–1942), German anti-Nazi resistance fighterMildred Harnack (1902–1943), American anti-Nazi resistance fighter, wife of ArvidFalk Harnack (1913–1991), German anti-Nazi resistance fighter, film and stage director, brother of Arvid HarnackOther usesHarnack's principle