All articles starting with J
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Jack Kilby
Jack Kilby (Jack St. Clair Kilby) was an American engineer at Texas Instruments who built the first integrated circuit in 1958 and shared the 2000 Nobel Prize in Physics.
Jack Kilmer
Jack Kilmer (John Wallace Kilmer), American actor born 1995 in Los Angeles, son of Val Kilmer and Joanne Whalley; debuted as Teddy in Palo Alto (2013), played Dead in Lords of Chaos, narrated the documentary Val.
Jack Kilpatrick
Jack Kilpatrick (John Kilpatrick, 1917-1989), British-born Canadian ice hockey left wing; won 1936 Winter Olympics gold with Great Britain after one game against Sweden, youngest Briton with a Winter gold.
Jack Kimble
Jack Kimble (@RepJackKimble) is a fictional satirical congressman from California's nonexistent 54th District, active since 2009, whose deadpan political parody has repeatedly fooled influencers, the Washington Post, and CNN.
Jack Kirby
Jack Kirby (Jacob Kurtzberg, 1917-1994), American comic book artist called the King of Comics; co-created Captain America with Joe Simon and, with Stan Lee at Marvel, the Fantastic Four, Hulk, Thor, X-Men, and Avengers; created DC's Fourth World and Darkseid; known for foreshortening, the squiggle, and the Kirby Krackle.
Jack Kirrane, Jr.
Jack Kirrane, Jr. (John Joseph Kirrane, Jr., 1928-2016), American defenseman and captain of the 1960 Squaw Valley U.S. Olympic hockey gold medal team; also played on the disqualified 1948 U.S. Olympic team.
Jack Kiser
Jack Kiser (born 2000) is an NFL linebacker from Royal Center, Indiana, drafted 107th overall in 2025 by the Jacksonville Jaguars after a record 70-game, six-season Notre Dame career and a special-teams-heavy rookie season.
Jack Klugman
Jack Klugman (Jacob Joachim Klugman, 1922–2012), American actor known as Oscar Madison on The Odd Couple (1970–75) and the title role of Quincy, M.E. (1976–83); three Primetime Emmys, Juror 5 in 12 Angry Men, 1960 Tony nomination for Gypsy.
Jack Kokko
Jack Kokko, born Jaakko Kokko, is a Finnish-born technology entrepreneur who co-founded AlphaSense in 2011 and leads the New York-based AI market-intelligence company as chief executive officer.
Jack Kramer
Jack Kramer (John Albert Kramer, 1921-2009), American tennis champion, world No. 1 in 1946, Wimbledon 1947 and U.S. Nationals 1946-47 winner, who turned pro in 1947, promoted the 1950s pro tours, and co-founded the ATP in 1972.
Jack Kuehler
Jack Kuehler (1932–2008) was an American electrical engineer who joined IBM in 1958, rose to president and vice chairman, and became the highest-ranking technologist in IBM's history.
Jack L. Feldman
Jack L. Feldman is an American neurobiologist at UCLA who identified the pre-Bötzinger complex, the brainstem region that generates the rhythm of breathing in mammals.
Jack L. Gallant
Jack L. Gallant, known as Jack Gallant, is an American cognitive neuroscientist at the University of California, Berkeley, known for decoding visual images and language meaning from fMRI brain activity.
Jack L. Kerrebrock
Jack Leo Kerrebrock (1928–2019) was an American aeronautical engineer who founded MIT's Space Propulsion Laboratory, headed its aero-astro department, wrote Aircraft Engines and Gas Turbines, and served NASA.
Jack L. Koenig
Jack L. Koenig (1933–2021) was an American polymer spectroscopist and founding faculty member of Case Western Reserve University's macromolecular science department, elected to the National Academy of Engineering in 2000.
Jack L. Paradise
Jack L. Paradise (1925–2021) was an American pediatrician and professor emeritus at the University of Pittsburgh whose randomized trials redefined tonsillectomy, adenoidectomy, and tympanostomy tube use in children.
Jack L. Rives
Jack L. Rives, retired U.S. Air Force lieutenant general, 15th Air Force Judge Advocate General (2006-2010), first TJAG at three-star rank, later American Bar Association executive director and Rocket Legal president.
Jack L. Strominger
Jack L. Strominger (born 1925) is an American immunologist and Higgins Professor of Biochemistry, Emeritus, at Harvard, known for determining the structures of human MHC proteins governing transplant rejection.
Jack L. Warner
Jack L. Warner, born Jack Leonard Warner, was a Canadian-born American studio executive who cofounded Warner Bros. with his brothers and ran its Hollywood production from the silent era through the 1960s.
Jack LaLanne
Jack LaLanne (François Henri LaLanne, 1914–2011), the 'Godfather of Fitness,' American fitness pioneer who opened an early Oakland health club in 1936, hosted The Jack LaLanne Show (1951–1985), invented gym machines, and performed famous strength stunts.
Jack Lambert (American football)
Jack Lambert (John Harold Lambert, born 1952, Mantua, Ohio), Steelers middle linebacker 1974-84, four Super Bowls, 28 interceptions, nine Pro Bowls, Hall of Fame 1990.
Jack Larson
Jack Larson (1928-2015), American actor and playwright, played Jimmy Olsen on Adventures of Superman (1952-58), then became a librettist for Virgil Thomson's Lord Byron and partner-producer of James Bridges.
Jack Laugher
Jack Laugher (born 1995, Harrogate) is a British springboard diver, City of Leeds club, and Great Britain's first Olympic diving champion, winning 3m synchro gold with Chris Mears at Rio 2016 plus silver, and bronzes at Tokyo 2020 and Paris 2024.
Jack Layton
Jack Layton (John Gilbert Layton, 1950–2011), Canadian politician, led the New Democratic Party 2003–2011 after a Toronto city council career, winning 103 seats and first-ever NDP Official Opposition status in 2011 before dying of cancer.
Jack Leach
Jack Leach (Matthew Jack Leach, born 1991, Taunton) is an English left-arm orthodox spinner for Somerset and England; 38 Tests, 142 wickets at 34.07, famous for the Headingley 2019 1 with Ben Stokes.
Jack Leiter
Jack Leiter (born 2000) is a Texas Rangers starting pitcher, second overall pick in 2021 out of Vanderbilt, where he threw a 16-K SEC no-hitter. After minor-league struggles, he reworked his delivery and went 10-10, 3.86 ERA in 2025.
Jack Lemmon
Jack Lemmon, born John Uhler Lemmon III, was an American actor known for Some Like It Hot and The Apartment, and the first actor to win Oscars in both acting categories.
Jack Lengyel
Jack Lengyel, American coach and athletic director; head coach of Marshall's 'Young' Thundering Herd (1971-74, 9-33) after the 1970 plane crash; later AD at Fresno State, Missouri, Navy; portrayed by Matthew McConaughey in We Are Marshall.
Jack Lenor Larsen
Jack Lenor Larsen (1927–2020) was an American textile designer whose studio blended hand techniques with power weaving for high-end modern interiors, and who founded LongHouse Reserve.
Jack Lew
Jack Lew, also known as Jacob J. Lew, is an American official who served as Treasury Secretary from 2013 to 2017 and as Ambassador to Israel from 2023 to 2025.