Спиридон Ганев Райчев (Spiridon Ganev Rajcev)

Inventor, scientist, and clean water advocate | Harvard University, Nashua High School South | Nashua: April 12, 1996 - Russia: August 7, 2008 | Deepika Kurup

French philosopher and sociologist | University of Paris 1 Pantheon-Sorbonne (2018), École normale supérieure Paris-Saclay, School for Advanced Studies in

Russian scientist | SA Lebedev Prize | Moscow State Aviation Technological University | Moscow: April 12, 1972 - Moscow: September 19, 1999 | Vsevolod

Croatian political scientist | London School of Economics and Political Science, University of Ljubljana, University of Manchester | Samobor: April 12, 1968

Swiss mathematical statistician | Fellow of the Institute of Mathematical Statistics (2006), Fellow of the American Statistical Association (2016) | ETH Zurich

Polish philosopher, professor of philosophy, archaeology, cultural anthropology. Author of works on the prehistoric period. | Nicolaus Copernicus University in Toruń

Italian mathematician | University of Pisa | Udine: April 12, 1961 - Madison: December 21, 2014 | Andrea Braides | Udine: April 12, 1961 - Madison: December 21, 2014

German philosopher | Officer's Cross of the Order of Merit of the Federal Republic of Germany | University of Tübingen | Opherten: April 12, 1958 - Dublin

Colombian mathematician | Johannes Gutenberg University Mainz, National University of Colombia | Los Santos: April 12, 1957 - Sankt Matteus: January 1, 1937

Belgian physicist and essayist | Jacques Deruyts Prize (1996) | Fashionable Nonsense | Université catholique de Louvain | Uccle: April 12, 1952 - 14th

German physicist | Max Planck Research Award (2005) | University of Cologne, Paris Diderot University, University of Fribourg | Freiburg im Breisgau: April 12

American geochemist | F.W. Clarke Medal (1978), Fellow of the American Association for the Advancement of Science (2009), James B. Macelwane Medal (1983)

British astronomer | Maxwell Medal and Prize (1986), Fellow of the Royal Society, Occhialini Prize (2015), Eddington Medal (2013), Fellow of the Institute of

German swimmer | Jean Améry award (1991) | Ludwig-Maximilian-University in Munich | Hof: April 12, 1950 - Penrhos: November 6, 1913 | Reinhard Merkel | Hof

French university professor | School for Advanced Studies in the Social Sciences | Strasbourg: April 12, 1949 - London: April 24, 1707 | François Jost

American philosopher | April 12, 1948 - Pompano Beach: February 5, 1967 | Leonard Harris | April 12, 1948 - Pompano Beach: February 5, 1967

Hungarian educator | Manó Beke Prize (2002) | Budapest: April 12, 1947 - Tashkent: November 3, 2020 | István Lénárt (Istvan Lenart) | Budapest: April 12

physicist | Federico Santa María Technical University | Puerto Montt: April 12, 1945 - November 27, 2023 | Ivan Schmidt Andrade | Puerto Montt: April 12, 1945

American mathematician | Fulkerson Prize (1994), Fellow of the American Mathematical Society (2013) | City University of New York | April 12, 1943 - January 1, 1768

Danish mathematician | Fellow of the American Mathematical Society (2013), Ostrowski Prize (2011) | University of Chicago, University of Copenhagen

Russian scientist | Medal "For Battle Merit", Order "For Service to the Homeland in the Armed Forces of the USSR", 3rd class, Order of the Red Banner of

Russian geologist | Honoured Worker of Higher Professional Education of the Russian Federation | Kazan Federal University | Chistopol’: April 12, 1938

Soviet test pilot, cosmonaut (1937-2017) | Hero of the Soviet Union (1984), Order of Lenin (1984), Medal "Veteran of Labour", Order of Friendship of Peoples

Russian scientist | Russian State Agricultural University | Saratov: April 12, 1937 - Moscow: July 26, 2021 | Alena Polzunova | Saratov: April 12, 1937

Austrian nuclear physicist | Bunsen–Kirchhoff Award (1991), Kardinal-Innitzer-Preis | TU Wien | Vienna: April 12, 1937 - Würzburg: December 23, 1516

Slovene physicist and chess player | University of Ljubljana | Celje: April 12, 1936 - October 18, 2023 | Ljubomir Črepinšek (Ljubomir Crepinsek) | Celje

Russian psychiatrist | Merited Scientist of the Russian Federation, USSR State Prize, Order of the Red Banner of Labour, Order of Honour | Russian National

Russian mathematician (1936–2012) | Uzhhorod National University | Lavki: April 12, 1936 - Uzhhorod: June 11, 2012 | Pter Gudivok | Lavki: April 12, 1936

mathematician and university professor | Fellow of the Institute of Mathematical Statistics (1986), professor emeritus (2001) | University of Bucharest

British politician (1930-2019) | Keble College, Christ's Hospital | Hoxton: April 12, 1930 - Headington: July 26, 2019 | Bryan Magee | Hoxton: April 12, 1930

Russian seismologist | MSU Faculty of Physics | Yakhroma: April 12, 1928 - Moscow: July 16, 1999 | Lev Rykunov | Yakhroma: April 12, 1928 - Moscow: July 16, 1999

Russian scientist | Order of the Red Banner of Labour, Fok Prize, Merited Scientist of the Russian Federation, Order of the Patriotic War 2nd class, Order of Lenin

American psychologist (1926-2011) | Walsh School of Foreign Service, Trinity College Dublin, University of Paris | Atlantic City: April 12, 1926 - Thompson

Soviet art historian | Department of History and Theory of Art, Faculty of History, Moscow State University | Moscow: April 12, 1925 - January 21, 2021 | Elena

Italian philosopher and politician (1923-2020) | Gold medal for merit in school, culture and art | Avellino: April 12, 1923 - Naples: April 24, 2020 | Aldo

Israeli philosophy scholar (1919-2019) | New York City: April 12, 1919 - December 1, 2019 | Ben-Ami Scharfstein | New York City: April 12, 1919 - December 1, 2019

French sociologist (1914–1994) | Roanne: April 12, 1914 - Villejuif: June 1, 1994 | Henri Desroche | Roanne: April 12, 1914 - Villejuif: June 1, 1994

Polish writer and chemist (1902-1995) | Commander with Star of the Order of Polonia Restituta (2007), Cross of Independence, Cross of Valour (1942), Army Medal

Czech philosopher, publicist and writer (1900–1945) | Order of Tomáš Garrigue Masaryk (1992), Czechoslovak War Cross 1939–1945 (1946) | Faculty of Arts

Czech Technical University in Prague | April 12, 1892 - Moscow: February 11, 2008 | Julie Hamáčková (Julie Hamackova) | April 12, 1892 - Moscow: February 11, 2008

Polish philosopher and theologian | Commander of the Order of Polonia Restituta | Jagiellonian University, Katholieke Universiteit Leuven | Dąbrówka Mała

Danish statistician | University College London, University of Copenhagen | April 12, 1878 - November 11, 1939 | Kirstine Smith | April 12, 1878 - November 11

Japanese lawyer | Order of the Sacred Treasure, 1st Class | Nihon University | April 12, 1876 - June 22, 1968 | Mannosuke Yamaoka | April 12, 1876 - June 22

German orientalist and politician (1876–1933) | Heidelberg University, Humboldt University of Berlin | Amsterdam: April 12, 1876 - Steglitz: February 10, 1933

German-Hungarian chemist | University of Vienna | Bremen: April 12, 1874 - Budapest: May 30, 1937 | Alexander Just - Alexander Friedrich Just | Bremen: April

Italian mathematician (1872-1934) | Mathematical Prize of the Italian Academy of Sciences (1915) | University of Palermo | Carini: April 12, 1872 - Messina: May 3, 1934

French chemist, painter, sculptor and composer (1872–1938) | Commander of the Legion of Honour, La Caze Prize of the Academy of Sciences (1912) | ESPCI

German mathematician (1854–1914) | Humboldt University of Berlin | Berlin: April 12, 1854 - Berlin: May 30, 1914 | Rudolf Lehmann-Filhés (Rudolf

German chemist (1854-1919) | Giessen: April 12, 1854 - Berlin: December 30, 1919 | Wilhelm Will | Giessen: April 12, 1854 - Berlin: December 30, 1919

American electrical engineer, inventor and pioneer of early electric motors (1853–1929) | Victor: April 12, 1853 - January 1, 1929 | Charles Schenk Bradley

German mathematician (1852–1939) | Bavarian Maximilian Order for Science and Art (1905) | Ludwig-Maximilian-University in Munich, University of

Russian mathematician (1847-1878) | school medal | Zolotarev's lemma | Faculty of Physics and Mathematics of the Saint Petersburg University | Saint

French electrical engineer (1833-1910) | Knight of the Legion of Honour | Arts et Métiers ParisTech | Dijon: April 12, 1833 - Hyères: February 17, 1910

American photographer (1832-1911) | Troy: April 12, 1832 - Lakeville: July 10, 1911 | George G. Rockwood | Troy: April 12, 1832 - Lakeville: July 10, 1911

April 12, 1832 - July 19, 1906 | Gustav Hodek | April 12, 1832 - July 19, 1906

German inventor (1825–1892) | Vienna: April 12, 1825 - Durlach: September 10, 1892 | Max Carl Gritzner | Vienna: April 12, 1825 - Durlach: September 10, 1892

French chemist (1824-1912) | Officer of the Legion of Honour (1889), Knight of the Order of Leopold | Paris: April 12, 1824 - Saint-Cloud: September 19, 1912

Russian physicist (1821-1881) | Order of St. Vladimir, 3rd class | Faculty of Physics and Mathematics of Moscow Imperial University | April 12, 1821 - December 9, 1880

member of the Swiss Federal Council (1799-1855) | University of Lausanne | Faoug: April 12, 1799 - Bern: March 29, 1855 | Henri Druey | Faoug: April 12, 1799

mathematician, soldier, engineering professor | Knight of the Order of Leopold (1841) | Dandelin spheres, Graeffe's method, Mémoire sur l’hyperboloïde de révolution

Russian linguist | Kazan Imperial University | Shishkeevo: April 12, 1785 - Saint Petersburg: October 18, 1851 | Vassili Perevoštšikov (Vassili

Scottish chemist | Fellow of the Linnean Society of London, Fellow of the Royal Society, Fellow of the Royal Society of Edinburgh | University of St Andrews

surgeon (1766-1841) | Cinzano: April 12, 1766 - Turin: December 18, 1841 | Francesco Rossi | Cinzano: April 12, 1766 - Turin: December 18, 1841

German philosopher | Dresden: April 12, 1744 - Leipzig: January 12, 1811 | Karl Adolf Caesar | Dresden: April 12, 1744 - Leipzig: January 12, 1811

French mathematician | Knight of the Royal and Military Order of Saint Louis | Mondeville: April 12, 1742 - Grenada: July 6, 1779 | Jean-Jacques de Marguerie

French journalist (1722-1772) | Paris: April 12, 1722 - Paris: January 3, 1772 | Antoine Le Camus | Paris: April 12, 1722 - Paris: January 3, 1772

French writer (1713-1796) | Fellow of the Royal Society | Histoire philosophique et politique des établissements et du commerce des Européens dans les deux Indes

British pharmacist | Kingsbridge: April 12, 1705 - Plymouth: October 17, 1780 | William Cookworthy | Kingsbridge: April 12, 1705 - Plymouth: October 17, 1780