Indonesian Islamic religious figure | Jakarta State Islamic University | Bondowoso: June 21, 1988 - January 1, 2011 | Husein Ja'far Al-Hadar | Bondowoso: June

University of Toronto, Steklov Institute of Mathematics | June 21, 1978 - December 31, 2023 | Vladlen Timorin | June 21, 1978 - December 31, 2023

Estonian philosopher (born 1961) | June 21, 1961 - Estonia Governorate: December 8, 1881 | Peeter Müürsepp (Peeter Muursepp) | June 21, 1961 - Estonia

Swiss physicist | Foreign Member of the Royal Society (2025), IEEE Fellow, Charles Hard Townes Award (2015), Frederic Ives Medal (2020), Carl Zeiss Research

French mathematician | Knight of the French Order of Academic Palms, Cours Peccot (1987) | Lycée Janson-de-Sailly, Lycée Louis-le-Grand, École Normale Supérieure

British mathematician | Fellow of the Society for Industrial and Applied Mathematics (2016), Fellow of the Royal Society (2021), Forder Lectureship (2015)

Austrian economist | Kardinal-Innitzer-Preis, Fellow of the Econometric Society (2008), Fellow of the Association for Psychological Science, Austrian

Russian mathematician (1954–2021) | Lenin Komsomol Prize, Mikhail Lomonosov Award, Prize of the Government of the Russian Federation in the field of education (2012)

Spanish philosophy professor and author | Sakharov Prize (2000), Dr. J.P. van Praag-prijs (1997), Ortega y Gasset Awards, Mariano de Cavia' Price, National

French actor | 14th arrondissement of Paris: June 21, 1946 - Skovorodynivka: November 9, 1794 | Patrice Moullet - Patrice Julien Maurice Moullet | 14th

chemist, physician | Bristol-Myers Squibb Award for Distinguished Achievement in Cardiovascular Research (1994), Louis-Jeantet Prize for Medicine (1986)

American mathematician | Fellow of the American Mathematical Society (2013), Fellow of the American Association for the Advancement of Science | Harvard University

British-Canadian science philosopher (1940–2024) | Fellow of the Royal Society of Canada, Guggenheim Fellowship | University of Bristol, McMaster University

Kazakhstani scientist | VDNKh silver medal | L. N. Gumilyov Eurasian National University | Chita: June 21, 1939 - Astana: January 7, 2007 | Vladimir Ganzhara

Czech photographer and university educator | Charles University | Prague: June 21, 1938 - Prague: December 15, 1989 | Petr Velkoborský (Petr Velkoborsky)

German mathematician and computer scientist | Berlin: June 21, 1938 - July 10, 2020 | Michael M. Richter | Berlin: June 21, 1938 - July 10, 2020

Russian mathematician | Steele Prize for Mathematical Exposition (2014) | Saint Petersburg State University, Mathematics and Mechanics Faculty, St. Petersburg

German mathematician | Johannes Gutenberg University Mainz | Meschede: June 21, 1934 - New York City: December 18, 1998 | Josef Stoer | Meschede: June 21, 1934

French computer scientist and mathematician | Commander of the Legion of Honour, Michel Monpetit Prize (1978) | lycée Henri-Poincaré, École Normale Supérieure

French jesuit and philosopher | Norolles: June 21, 1931 - 14th arrondissement of Paris: July 12, 2018 | Pierre-Jean Labarrière - Pierre Jean Michel Marie

Argentine editor and photographer | Buenos Aires: June 21, 1931 - Madrid: March 27, 2022 | Mario Muchnik | Buenos Aires: June 21, 1931 - Madrid: March 27, 2022

Maltese philosopher | Heythrop College, University of London | Ħamrun: June 21, 1931 - Naxxar: August 6, 2006 | Salvino Azzopardi | Ħamrun: June 21, 1931

American nuclear physicist | Guggenheim Fellowship (1974) | Duke University | New York City: June 21, 1929 - Blacksburg: February 12, 2017 | Paul Frederick

Jewish American chemist (1929–2016) | Garvan–Olin Medal (1974) | Johns Hopkins University | The Bronx: June 21, 1929 - Baltimore: August 26, 2016 | Joyce

Austrian mathematician (1928-1988) | University of Vienna | Ungenach: June 21, 1928 - Vienna: February 12, 1988 | Wilfried Nöbauer (Wilfried Nobauer)

German topologist (1928–2022) | Fulkerson Prize (1979) | University of Kiel | Berlin: June 21, 1928 - Champaign: October 2, 2022 | Wolfgang Haken | Berlin

Dutch engineer and inventor (1926-2021) | Delft University of Technology | Bellingwolde: June 21, 1926 - Duizel: March 6, 2021 | Lou Ottens - Lodewijk Frederik

Purple Heart (1951), Purple Heart, Silver Star (1951) | St. Bonaventure University | June 21, 1924 - Saint Petersburg: April 26, 1934 | Francis A. Kennedy

American chemist (1923-2012) | Tulane University | Jiangsu: June 21, 1923 - May 5, 2012 | Marguerite S. Chang | Jiangsu: June 21, 1923 - May 5, 2012 | Tulane University

Hungarian mathematician (1918–1955) | Kossuth Prize (1952) | University of Debrecen, University of Szeged | Debrecen: June 21, 1918 - Szeged: April 5, 1955

American chemist (1914-2004) | University of Wisconsin–Madison | June 21, 1914 - April 14, 2004 | Donald E. Pearson | June 21, 1914 - April 14, 2004

Polish pilot, officer, spy, engineer and inventor | Silver Cross of the Virtuti Militari, Righteous Among the Nations (1995), Officer of the Order of Polonia

Swiss inventor (1909-1982) | IEEE Fellow, honorary doctor of ETH Zürich | ETH Zurich | Chur: June 21, 1909 - Zurich: January 12, 1982 | Gustav Guanella

American philosopher (1908–1994) | Carus Lectures (1974), Guggenheim Fellowship (1948) | Harvard University, University of Michigan, Calvin University

Soviet mining engineer (1907–1951) | Order of the Badge of Honour, Medal "For Valiant Labour in the Great Patriotic War 1941–1945", Order of the Red Banner

French existentialist philosopher (1905–1980) | Grand Prize for the Best Novels of the Half-Century, Fellow of the American Academy of Arts and Sciences

University of Ljubljana | June 21, 1901 - Ljubljana: May 31, 1954 | Franjo Čibej (Franjo Cibej) | June 21, 1901 - Ljubljana: May 31, 1954

Ukrainian Soviet scientist (1897–1942) | Peter the Great Saint Petersburg State Polytechnical University | Poltava: June 21, 1897 - Kaluga: February 23, 1942

Soviet politician | Order of the Red Banner | Saint Petersburg State Institute of Technology | Krasnoye Selo: June 21, 1892 - Moscow: September 7, 1938

National University of Córdoba | June 21, 1886 - Berlin: January 4, 1875 | Luis Guillermo Martínez Villada (Luis Guillermo Martinez Villada)

Hungarian economist (1884-1984) | Eötvös Loránd University | Titel: June 21, 1884 - Pécs: August 27, 1984 | Dénes Kislégi Nagy - Nagy Dénes Kálmán

Polish physicochemist (1881-1968) | Order of Saint Stephen of Hungary, Commander of the Order of Polonia Restituta (1925), Commander of the Order of the Crown

Polish chemist (1879-1944) | Commander of the Order of Polonia Restituta, Decade of Independence Regained (1928), Knight of the Order of Polonia Restituta

Spanish educationist and professor (1879-1938) | University of Barcelona | Vilafranca del Penedès: June 21, 1879 - Barcelona: April 20, 1938 | Josep Estalella

Serbian politician (1878-1938) | Čačak: June 21, 1878 - Moscow: January 1, 1938 | Filip Filipović (Filip Filipovic | B. Bošković) | Čačak: June 21, 1878

Dutch physicist (1876–1956) | University of Amsterdam | Texel: June 21, 1876 - Leiden: March 3, 1956 | Willem Hendrik Keesom - Wilhelmus Hendrikus Keesom

Baltic German mathematician (1874-1905) | Humboldt University of Berlin | Tallinn: June 21, 1874 - Saint Petersburg: December 10, 1905 | Heinrich Karstens

Italian mathematician (1872-1929) | Scuola Normale Superiore | Rieti: June 21, 1872 - Pisa: December 31, 1929 | Onorato Nicoletti | Rieti: June 21, 1872

Italian historian and writer (1871-1942) | honorary doctorate from the University of Strasbourg (1922) | University of Turin, University of Pisa, University of Bologna

German chemist (1870-1915) | University of Wrocław | Wojczyce: June 21, 1870 - Dahlem: May 2, 1915 | Clara Immerwahr - Clara Helene Immerwahr | Wojczyce: June

Belgian physicist (1863-1939) | Elliott Cresson Medal (1913), Bessemer Gold Medal, Franklin Medal (1939), doctor honoris causa from the University of Grenoble (1924)

American pharmacist; inventor of Dr Pepper | Dr Pepper | University of Texas Medical Branch | England: June 21, 1857 - Waco: May 29, 1941 | Charles Courtice

June 21, 1856 - Tel Aviv: September 23, 1936 | Elis Schenson | June 21, 1856 - Tel Aviv: September 23, 1936

French chemist (1851-1921) | Knight of the Legion of Honour (1905) | June 21, 1851 - January 26, 1921 | Émile Bourquelot (Emile Bourquelot) | June 21, 1851

Polish chemist | Heidelberg University | Włodawa: June 21, 1851 - Konice: January 1, 1928 | Bolesław Masłowski (Boleslaw Maslowski) | Włodawa: June 21

Japanese pharmacologist | Nagoya: June 21, 1850 - August 2, 1910 | Shibata Shōkei (Shibata Shokei) | Nagoya: June 21, 1850 - August 2, 1910

Italian philosopher (1845–1917) | Order of Saints Maurice and Lazarus | University of Turin | Chiusa di Pesio: June 21, 1845 - Turin: November 17, 1917

German polar explorer and scientist (1826-1909) | Cullum Geographical Medal (1904), Cothenius Medal (1906), Foreign Member of the Royal Society (1899)

Uppsala University | June 21, 1820 - Passy: January 19, 1865 | Henrik Gahn den yngre | June 21, 1820 - Passy: January 19, 1865

Commander of the Legion of Honour | École Normale Supérieure | June 21, 1807 - Uttar Pradesh: January 20, 2020 | Adolphe Mourier | June 21, 1807 - Uttar

chemist (1805–1880) | Montyon Science Award (1847), Fellow of the American Academy of Arts and Sciences | Harvard Medical School | Plymouth: June 21, 1805

1802-1868) | University of Liège | Esch-sur-Alzette: June 21, 1802 - Liège: May 13, 1868 | Jean-Baptiste Brasseur | Esch-sur-Alzette: June 21, 1802

Azerbaijani writer and scholar | Order of Saint Anna, 2nd class, Order of Saint Stanislaus, 3rd class, Order of the Lion and the Sun First class (1829), Order

French mathematician, mechanician and physicist (1781–1840) | Fellow of the Royal Society (1818), Copley Medal (1832), Lalande Prize (1810), Fellow of the

eccentric and self-proclaimed philosopher (1772-1851) | Haltwhistle: June 21, 1772 - Chelsea: February 9, 1851 | William Martin | Haltwhistle: June 21, 1772

French academic (1763-1845) | Colleges of St Omer, Bruges and Liège | Sompuis: June 21, 1763 - Châteauvieux: September 2, 1845 | Pierre Paul Royer-Collard

Japanese scholar and philosopher (1730–1801) | Shibun Yōryō, Kojiki-den, Genji Monogatari Nenkikō, Isonokami Sasamegoto | Matsusaka: June 21, 1730

British painter and scientist (1721-1788) | Copley Medal (1760), Gold Medal of the Royal Astronomical Society, Fellow of the Royal Society | Leeds: June 21

English optician, known for his achromatic doublets | Fellow of the Royal Society, Copley Medal (1758) | Spitalfields: June 21, 1706 - London: November 29, 1761