I︠U︡riĭ Mikhaĭlovich Kli︠u︡chnikov (IUrii Mikhailovich Kliuchnikov)

Slovenian politician | December 24, 1987 - February 14, 2022 | Dan Juvan | December 24, 1987 - February 14, 2022

Romanian-American mathematician | Morgan Prize (2001), Fellow of the American Mathematical Society (2017) | Harvard University | Alexandria: December 24, 1978

Belgian writer | UCLouvain Saint-Louis – Bruxelles | Brussels metropolitan area: December 24, 1977 - Warsaw: September 28, 1939 | Laurent de Sutter

French mathematician | Maurice Audin Mathematic Prize (2010), Blaise-Pascal Award, Felix Klein Prize (2012) | École normale supérieure Paris-Saclay

Austrian historian and philosopher | Klagenfurt am Wörthersee: December 24, 1972 - July 20, 1899 | Ingo Zechner | Klagenfurt am Wörthersee: December 24, 1972

Austrian biochemist | University of Vienna | Vienna: December 24, 1965 - Karachi: February 21, 2025 | Peter F. Stadler - Peter Florian Stadler | Vienna

German physicist | Ludwigshafen: December 24, 1965 - New Delhi: September 1, 2018 | Michael Decker | Ludwigshafen: December 24, 1965 - New Delhi: September 1, 2018

Estonian chemist, materials scientist and inventor | University of Tartu, Tallinn University of Technology, Gustav Adolf Grammar School, Tallinn Secondary

Hungarian mathematician (1956–2021) | Babeș-Bolyai University | Odorheiu Secuiesc: December 24, 1956 - Gheorghieni: April 19, 2021 | Gábor Kassay (Gabor

American businessman | Massachusetts Institute of Technology | Los Angeles: December 24, 1956 - Tampa: April 20, 1999 | Steve Kirsch | Los Angeles: December

Moroccan politician | Pierre and Marie Curie University, McGill University | Salé: December 24, 1954 - Kraków: April 22, 2021 | Mohamed Amine Sbihi | Salé

Azerbaijani scientist | Baku: December 24, 1950 - January 1, 2003 | Elza Salahova | Baku: December 24, 1950 - January 1, 2003

Swedish mathematician | Stefan Bergman Prize (2017), Göran Gustafsson Prize for mathematics (1995) | University of Gothenburg | December 24, 1950 - New York

French philosopher (1947–2017) | Paris Descartes University, University of Paris 1 Pantheon-Sorbonne | Hofgeismar: December 24, 1947 - 12th arrondissement of

Indian surgeon | Padma Shri in Medicine | Sawai ManSingh Medical College, Ross School of Business, Christian Medical College Vellore, University of Rajasthan

Marxist philosopher, social critic and journalist (1943–2012) | The Black Book of Capitalism | Nuremberg: December 24, 1943 - Nuremberg: July 18, 2012

American logician and mathematician | Carol Karp Prize (1988), Guggenheim Fellowship (1989), Gödel Lecturer (1994), Tarski Lectures (1992), Fellow of the

American chemist | Guggenheim Fellowship, Ralph F. Hirschmann Award in Peptide Chemistry (2002), honorary doctorate of the Vrije Universiteit Brussel (1989)

American logician and mathematician | University of Wisconsin–Madison | December 24, 1937 - Basel: February 15, 1916 | Joan Moschovakis | December 24, 1937

Russian scientist | Faculty of Medicine of Ternopil National Medical University | Osławica: December 24, 1936 - Donetsk: August 10, 2012 | Vasyl Antoniv

Russian mathematician | Medal "Veteran of Labour", Honoured Higher education employee of the Russian Federation | Kazan Federal University, Faculty of

Argentine-Mexican philosopher | honorary doctorate (2022), Albertus-Magnus professorate (2010) | Catholic University of Paris (1965), Universidad Nacional de

Sinelnikov Prize (NAS of Ukraine), Lashkaryov Prize, State Prize of Ukrainian SSR in Science and Technology (1970), State Prize of Ukraine in Science and

Italian engineer (1930-2002) | Polytechnic University of Turin, University of Turin | Turin: December 24, 1930 - Genoa: January 23, 2002 | Pier Giorgio Perotto

German philosopher (1930–2021) | Princeton University | Weimar Republic: December 24, 1930 - Ann Arbor: May 24, 2021 | Frithjof Bergmann | Weimar Republic

Polish physicist (1928–2015) | Knight of the Order of Polonia Restituta, Gold Cross of Merit, Officer of the Order of Polonia Restituta | Adam Mickiewicz

December 24, 1925 - Budapest: January 18, 1940 | Jordi Capell i Casaramona | December 24, 1925 - Budapest: January 18, 1940

German philosopher (1925–2020) | Hamborn: December 24, 1925 - Münster: January 1, 2020 | Heinrich Schepers | Hamborn: December 24, 1925 - Münster: January 1, 2020

Spanish philosopher (1921-2009) | Grand Cross of the Order of Civil Merit (1963) | University of Madrid (1945) | Corella: December 24, 1921 - Seville: January 18, 2009

American physicist and professor | City College of New York | New York City: December 24, 1920 - September 30, 2008 | Harry Soodak | New York City: December

Dutch physicist (1915-2009) | Haarlem: December 24, 1915 - May 11, 2009 | Hendrik Jan Vink | Haarlem: December 24, 1915 - May 11, 2009

rocket scientist born in New Zealand | honorary doctor of the University of Canterbury (2003), Theodore von Kármán Award (1990), Edison Medal (1972), William

Stalin Prize, 2nd degree, Order of Lenin, Medal "For Valiant Labour in the Great Patriotic War 1941–1945", State Stalin Prize, 1st degree, Order of the

American aviator, engineer, industrialist, and film producer (1905–1976) | Congressional Gold Medal, National Aviation Hall of Fame (1973) | Fessenden

American Controls and Communications pioneer (1905-1982) | IEEE Fellow, Fellow of the American Physical Society, Richard E. Bellman Control Heritage Award

German mathematician (1904–1942) | Scholz conjecture, Scholz's reciprocity law | Frederick William University Berlin, Kaiserin Augusta Gymnasium

sociologist, literary critic (1878–1946) | Saint Petersburg State University | Tbilisi: December 24, 1878 - Munich: July 9, 1946 | Razumnik Ivanov-Razumnik

American physician and bacteriologist | December 24, 1877 - May 21, 1948 | Olga Povitzky | December 24, 1877 - May 21, 1948

Czech-born philosopher and Esperantist (1872-1957) | Zbyslav (Vrdy): December 24, 1872 - Porto Alegre: May 24, 1957 | František Lorenz (Frantisek Lorenz)

Hindu guru | Chikodi: December 24, 1872 - Pandharpur: March 24, 1942 | Satyadhyana Tirtha | Chikodi: December 24, 1872 - Pandharpur: March 24, 1942

former World Chess champion (1868–1941) | Hall of Fame des deutschen Sports, world chess champion | Heidelberg University, University of Erlangen–Nuremberg

scientist | Pirdop: December 24, 1867 - May 25, 1906 | Manol Ivanov | Pirdop: December 24, 1867 - May 25, 1906

Czech teacher and mathematician (1855–1892) | Lnáře: December 24, 1855 - Karlín: October 8, 1892 | František Machovec (Frantisek Machovec) | Lnáře

Swiss chemist (1850-1893) | Bülach: December 24, 1850 - March 2, 1893 | Alfred Kern | Bülach: December 24, 1850 - March 2, 1893

Italian chemist (1847–1918) | University of Bologna | San Secondo Parmense: December 24, 1847 - Turin: June 20, 1918 | Icilio Guareschi | San Secondo

American businessman | University of the Sciences in Philadelphia | December 24, 1846 - February 6, 1895 | Silas M. Burroughs | December 24, 1846 - February 6

German chemist (1841–1910) | Racibórz: December 24, 1841 - Hanover: August 17, 1910 | Julian Treumann | Racibórz: December 24, 1841 - Hanover: August 17, 1910

Polish writer and academic (1839–1909) | Jagiellonian University | Kraków: December 24, 1839 - Kraków: January 13, 1909 | Adam Bełcikowski (Adam

Danish astronomer (1838–1910) | University of Copenhagen | Copenhagen: December 24, 1838 - Copenhagen: September 26, 1910 | Thorvald N. Thiele | Copenhagen

Italian businessman (1836–1900) | Nizza Monferrato: December 24, 1836 - Rome: January 9, 1900 | Francesco Cirio | Nizza Monferrato: December 24, 1836 - Rome

German teacher and mathematician (1835-1900) | Steinwedel: December 24, 1835 - Wilmersdorf: July 7, 1900 | Ernst Goedecker | Steinwedel: December 24, 1835

physical chemist (1834–1919) | Bakerian Lecture (1895) | University of Oxford, Harrow School, Balliol College | London: December 24, 1834 - Ryde: August 23, 1919

Italian mathematician | Marciana Marina: December 24, 1827 - Porto Azzurro: February 14, 1917 | Giuseppe Cerboni | Marciana Marina: December 24, 1827 - Porto

German theologian (1827–1905) | Imperial University of Dorpat | Tartu: December 24, 1827 - Tartu: August 20, 1906 | Alexander von Oettingen | Tartu: December

French mathematician (1822-1901) | Grand Officer of the Legion of Honour, Pour le Mérite for Sciences and Arts order, Foreign Member of the Royal Society (1873)

English physicist and brewer (1818-1889) | Royal Medal (1852), Fellow of the American Academy of Arts and Sciences, Copley Medal (1870), Albert Medal (1880)

Bulgarian philosopher, scholar, teacher and medical doctor | Sliven: December 24, 1799 - Galați: August 21, 1866 | Ivan Seliminski | Sliven: December 24, 1799

Czech physicist, mathematician, professor, inventor, university educator and science writer (1799–1855) | Charles University | Semily: December 24, 1799

Austrian astronomer | Fellow of the American Academy of Arts and Sciences | Vienna: December 24, 1766 - Bad St. Leonhard im Lavanttal: November 25, 1834

Japanese mathematician (1760-1837) | December 24, 1760 - January 9, 1837 | Tōemon Ishiguro (Toemon Ishiguro) | December 24, 1760 - January 9, 1837

Danish philosopher | Kirke Hvalsø: December 24, 1753 - Copenhagen: September 11, 1833 | Anders Gamborg | Kirke Hvalsø: December 24, 1753 - Copenhagen

German pharmacist and naturalist | Order of the Red Eagle 2nd Class | Königsberg: December 24, 1749 - Königsberg: March 2, 1829 | Karl Gottfried Hagen

Russian mathematician (1740-1784) | Lexell's Comet, Lexell's theorem | Royal Academy of Turku | Turku: December 24, 1740 - Saint Petersburg: December 11, 1784

French philosopher | Semur-en-Auxois: December 24, 1631 - Dijon: March 5, 1703 | Gabrielle Suchon (G. S. Aristophile) | Semur-en-Auxois: December 24, 1631

German philosopher and jurist (1586-1647) | Myślibórz: December 24, 1586 - Klagenfurt am Wörthersee: August 2, 1647 | Christian Liebenthal | Myślibórz

French seer and astrologer (1503–1566) | Prognostication | University of Montpellier, Avignon University | Saint-Rémy-de-Provence: December 24, 1503