Biographies

Leo Vroman (1915–2014): Dutch-American hematologist, poet and illustrator Leo Vroman Leo Vroman was a Dutch-born hematologist, illustrator and prolific poet who wrote mainly in Dutch. He is known for the Vroman effect in blood research and for a long literary caree…

Leon Ames American actor (1902–1993) known for steady character work in film and television, often cast as paternal or authoritative figures; notable films include Meet Me in St. Louis and T…

Léon Bakst: Painter and Theatrical Designer of the Ballets Russes Léon Bakst Russian-born painter and stage designer Léon Bakst (1866–1924) created vivid sets and costumes for Diaghilev's Ballets Russes, influencing early 20th-century theatre, fashion, and…

Leon Bibb (1922–2015): American folk singer and stage performer Leon Bibb Leon Bibb was an American folk singer and actor known for spirituals and folk repertoire, television appearances in the 1960s, Broadway work, and his long residence in Vancouver, B…

Leon Brittan, Baron Brittan of Spennithorne Leon Brittan Leon Brittan (1939–2015) was a British barrister and Conservative politician who served as Home Secretary (1983–85), later as a European Commissioner and life peer; his career comb…

Leon Cooper: Physicist, Cooper Pair Discoverer, and Neuroscience Theorist Leon Cooper Leon N. Cooper (b. 1930) is an American physicist who co-developed BCS theory of superconductivity, discovered the Cooper pair, co-created the BCM model of synaptic plasticity, and…

Leon Czolgosz: assassin of President William McKinley Leon Czolgosz Overview of Leon Czolgosz (1873–1901), an American anarchist who killed President William McKinley; covers background, motives, trial, execution and historical impact.

Leon de Wolff: Dutch journalist, media researcher and consultant Leon de Wolff Profile of Leon de Wolff (1948–2014), a Dutch journalist and media consultant who developed methods for classifying journalistic output and advised editors in the Netherlands and B…

León Febres-Cordero León Febres Cordero Ecuadorian politician and business leader, head of the Social Christian Party, who served as President of Ecuador (1984–1988). Known for pro-market reforms, a strong executive styl…

Léon Foucault French experimental physicist best known for the Foucault pendulum, methods to measure the speed of light, and optical testing techniques in the mid‑19th century.

Leon Goretzka: German Midfielder for Bayern Munich and the National Team Leon Goretzka Profile of Leon Goretzka, a German central/box-to-box midfielder for Bayern Munich and the Germany national team, covering playing style, career development, achievements and notab…

Leon A. Gorman — L.L.Bean leader, American businessman and philanthropist Leon Gorman Leon A. Gorman (1934–2015) was the grandson of L.L.Bean's founder, served as the company's president and chairman, expanded its national presence, and was a noted philanthropist in…

Leon Jackson Scottish singer who won The X Factor (UK) in 2007; known for the single “When You Believe” and the album Right Now. Career includes major-label debut, later independent releases, a…

Léon Kalenga Badikebele — Congolese Catholic prelate and Vatican diplomat Léon Kalenga Badikebele Biography of Léon Kalenga Badikebele (1956–2019), a Congolese Catholic prelate who served in the diplomatic service of the Holy See and was Apostolic Nuncio to Argentina from 2018…

Leon Lederman (1922–2018) — experimental physicist and educator Leon Lederman Leon Lederman was an American experimental physicist best known for co-discovering the muon neutrino, directing Fermilab, winning the 1988 Nobel Prize, and promoting science educat…

Léon M'ba: First President of Gabon (1902–1967) Léon M'ba Overview of Léon M'ba, Gabon's first president: political career, 1964 coup, relationship with France, legacy, and memorials including the airport and mausoleum.

Leon Osman — English midfielder best known for his long Everton career Leon Osman Leon Osman (born 17 May 1981) is an English former professional footballer who spent the bulk of his career at Everton as an attacking midfielder, noted for consistency, set pieces…

Leon Panetta: U.S. public official, CIA director and Secretary of Defense Leon Panetta Leon Panetta is an American lawyer and politician who served as CIA director (2009–2011), U.S. Secretary of Defense (2011–2013), White House Chief of Staff and a long-serving U.S.…

Leon Redbone: singer, guitarist, and interpreter of early American popular music Leon Redbone Leon Redbone (1949–2019) was a Cypriot‑American singer and guitarist known for performing Tin Pan Alley, ragtime, jazz and blues standards with a deliberate, old‑time style.

Leon Russell: pianist, songwriter, and influential session musician Leon Russell Leon Russell (1942–2016) was an American pianist, bandleader and songwriter who blended rock, gospel, country and blues, known for 'A Song for You', work with Joe Cocker, and wide-…

Leon Spinks: Olympic Champion and Heavyweight Titleholder Leon Spinks Leon Spinks was an American boxer who won 1976 Olympic gold and shocked the world by taking the world heavyweight title from Muhammad Ali; later career, family, illness, and legacy…

Léon Theremin (Lev Termen): inventor of the theremin Léon Theremin Russian inventor Léon Theremin (Lev Termen) created the theremin, an early electronic instrument. This article outlines his life, the instrument's design, cultural impact, and nota…

Leon Thomas III American actor, singer and songwriter born in 1993 in Brooklyn; known for playing André Harris on Nickelodeon's Victorious and for a subsequent career in music and production.

Leon Trotsky (Lev Davidovich Bronstein) Leon Trotsky Russian revolutionary, Marxist theorist and Red Army founder. Key leader in 1917, advocate of Permanent Revolution, opponent of Stalin, founder of the Fourth International, assassi…

Leon Ware — American songwriter, producer, and soul artist Leon Ware Leon Ware (1940–2017) was a Detroit-born songwriter, producer and solo artist known for shaping late 20th-century soul and R&B; he wrote and produced for Marvin Gaye, Michael Jacks…

Leona Lewis Leona Lewis is a British singer, songwriter and actress who rose to international fame after winning The X Factor in 2006; known for the global hit "Bleeding Love" and the debut al…

Leonard Bernstein American conductor, composer and educator known for West Side Story, his tenure with the New York Philharmonic, Young People's Concerts, and a wide-ranging body of classical and th…

Leonard L. Boswell (1934–2018) Leonard Boswell Leonard Boswell was a Democratic U.S. Representative from Iowa (1997–2013), a long-time public servant from the Midwest who served in state and federal office and died in 2018.

Leonard Cohen: poet, songwriter and cultural icon Leonard Cohen Leonard Cohen (1934–2016) was a Canadian poet, novelist, singer-songwriter and artist whose spare, profoundly lyrical work addressed religion, love, politics and mortality.

Leonard Goldberg: American film and television producer Leonard Goldberg Overview of Leonard J. Goldberg (1934–2019), a prominent American TV and film producer, studio executive, and founder of Panda Productions, with career highlights, productions, and…

Leonard H. Perroots — U.S. Air Force General and Director of the DIA Leonard H. Perroots Leonard H. Perroots (1933–2017) was a United States Air Force general who led the Defense Intelligence Agency from 1985 to 1988. This article outlines his career, the agency's role…

Leonard G. Lee — Canadian entrepreneur and founder of Lee Valley Tools Leonard Lee Leonard G. Lee (1938–2016) was a Canadian entrepreneur who built Lee Valley Tools and other businesses, founded a publishing imprint, and was appointed to the Order of Canada for h…

Leonard Litwin Leonard Litwin (1914–2017) was an American real estate developer who built and managed a portfolio of high-quality residential buildings in Manhattan through Glenwood Management.

Leonard Maltin American film critic and historian, author of long-running reference guides and creator of the Walt Disney Treasures collections; known for books on animation and decades of critic…

Leonard Nimoy: actor, director, artist and the man behind Spock Leonard Nimoy Leonard Nimoy (1931–2015) was an American actor and multi‑disciplinary artist best known for originating the role of Spock on Star Trek; he also directed films and pursued poetry,…

Leonard Peltier: Native American activist and controversial prisoner Leonard Peltier Leonard Peltier (born 1944) is a Native American activist and AIM member convicted in 1977 for the 1975 deaths of two FBI agents; his trial, appeals and clemency petitions have dra…

Leonard Pietraszak: Polish film and television actor (born 1936) Leonard Pietraszak Overview of Leonard Pietraszak, a Polish actor born in 1936, his career highlights in film and television, notable roles, selected filmography and cultural significance.

Leonard Starr Leonard Starr (1925–2015) was an American cartoonist and illustrator best known for creating the newspaper strip On Stage and for reviving Little Orphan Annie; he also worked in co…

Leonardo Araújo (Brazilian footballer) Leonardo Araújo Leonardo Araújo is a retired Brazilian footballer known for his creativity on the left flank, successful spells with major European clubs, and later leadership roles in football ma…

Leonardo da Vinci: Italian Renaissance painter, scientist, and polymath Leonardo da Vinci Comprehensive overview of Leonardo da Vinci (1452–1519): life, principal works, range of studies and inventions, methods, and lasting influence on art, science and engineering.

Leonardo De Lorenzo: Italian-born flautist, composer, and educator Leonardo De Lorenzo Leonardo De Lorenzo (1875–1962) was an Italian flautist who emigrated to the U.S., performed widely, and taught at Eastman; he influenced 20th-century flute performance and pedagog…

Leonardo DiCaprio Leonardo DiCaprio is an American actor and producer noted for his range of film roles, collaborations with prominent directors, an Academy Award for The Revenant, and active enviro…

Leonardo Moreira — Brazilian professional footballer Leonardo Moreira Leonardo Augusto Vieira Moreira (born 4 February 1986) is a Brazilian professional footballer who has played for Tochigi in Japan. Article summarizes his background, career context…

Leon (Leone) Battista Alberti (1404–1472) Leone Battista Alberti Italian Renaissance humanist and polymath: architect, theorist, writer and inventor. Alberti shaped art and architecture with treatises on painting and building and applied classic…

Leone di Lernia Italian radio host, singer, actor and composer famed for comic parody covers of dance songs and long association with Radio 105's Lo Zoo di 105. Born 1938, died 2017.

Leone Frollo: Italian Comic Artist Known for Biancaneve, Lucifera, Yra Leone Frollo Leone Frollo (1931–2018) was an Italian comic artist from Venice, noted for elegant linework and adult-themed series such as Biancaneve, Lucifera and Yra. His work bridged adventur…

Leonel Sánchez — Chilean footballer and 1962 World Cup star Leonel Sánchez Leonel Sánchez (1936–2022) was a Chilean footballer, legendary left winger for Universidad de Chile and a key member of Chile's 1962 World Cup third-place team, known for a powerfu…

Leonhard Nagenrauft: West German Luger and European Champion Leonhard Nagenrauft Profile of Leonhard Nagenrauft (1938–2017), a West German luger who won European and World Championship medals and competed at two Winter Olympics during the late 1960s–early 1970s…