writer, medical doctor and philologist, founder of University of Tartu and one of the authors of Kalevipoeg Friedrich Karl Florian (1894–1975), Gauleiter of Düsseldorf in Nazi Germany Friedrich Fröbel (1782–1852), German pedagogue Friedrich Fromm (1888–1945), German army officer, Commander in Chief of the Reserve Army (Ersatzheer), in charge of training and personnel replacement for combat divisions of the German Army, executed for failing to act against the plot of 20 July 1944 to assassinate Hitler Friedrich Geisshardt (1919–1943), German World War II flying ace Friedrich von Gerok, German World War I general Friedrich Goldmann (1941–2009), German composer and conductor Friedrich August Grotefend (1798–1836), German philologist Carl Friedrich Goerdeler (1884–1945), monarchist conservative German politician, executive, economist, civil servant, and opponent of the Nazi regime Friedrich "Fritz" Haarmann (1879-1920), prolific German cannibalistic serial killer, rapist, and fraudster Friedrich "Fritz" Hartjenstein (1905–1954), German Nazi SS concentration camp commandant Friedrich Herrlein, German World War II general Friedrich Hildebrandt (1898–1948), German SS Obergruppenführer, a Gauleiter, executed for war crimes Friedrich Hirzebruch (1927–2012), German mathematician Friedrich von Ingenohl (1857–1933), German admiral from Neuwied best known for his command of the German High Seas Fleet at the beginning of World War I Friedrich Jeckeln (1895–1946), German SS commander during the Nazi era, Higher SS and Police Leader in the occupied Soviet Union during World War, commander of one of the largest collection of Einsatzgruppen death squads, personally responsible for ordering and organizing the deaths of over 100,000 Jews, Romani, and others designated by the Nazis as "undesirables", the principal perpetrator of Rumbula massacre Friedrich Kellner (1885–1970), mid-level official in Germany who worked as a justice inspector in Mainz and Laubach, best known for his diaries that got published in the original German in 2011 and in English by Cambridge University Press in 2018. Friedrich Reinhold Kreutzwald (1803-1882), Estonian writer, one of the authors of Kalevipoeg Friedrich-Wilhelm Krüger (1894–1945), Nazi official and high-ranking member of the SA and the SS, Higher SS and Police Leader in the General Government in German-occupied Poland and one of the major perpetrators of the Holocaust Friedrich Loeffler (1852–1915), German bacteriologist Friedrich Kasimir Medikus (1738–1808), German physician and botanist Friedrich Olbricht (1888–1944), German general during World War II and one of the plotters involved in the 20 July Plot, an attempt to assassinate Hitler in 1944 Friedrich Panzinger (1903–1959), German SS officer during the Nazi era, head of the Reich Main Security Office