All articles starting with J
20,615 articles
Jack Lewis, Baron Lewis of Newnham
Jack Lewis, Baron Lewis of Newnham (1928 to 2014) was a British inorganic chemist who helped pioneer modern inorganic chemistry and was Professor of Chemistry at Cambridge from 1970 to 1995.
Jack Lieberman
Jack Lieberman, M.D., is a pulmonary-medicine researcher known for papers from 1959 to 1961 showing deficient lung fibrinolysis in hyaline-membrane disease, and for later work on alpha1-antitrypsin deficiency and emphysema.
Jack Lisowski
Jack Lisowski (born 1991, Cheltenham), nicknamed Jack-Pot, English left-handed snooker professional since 2010; won his first ranking title at the 2025 Northern Ireland Open, beating Judd Trump 9-8 after six lost finals; highest ranking 10.
Jack London
Jack London, born John Griffith Chaney, was an American writer and socialist activist best known for The Call of the Wild (1903) and White Fang (1906).
Jack Lord
Jack Lord (John Joseph Patrick Ryan, 1920–1998), American actor, director, and painter; starred as Steve McGarrett on CBS's Hawaii Five-O (1968–1980), the first Felix Leiter in Dr. No, and a builder of Hawaii's film industry.
Jack Lowden
Jack Lowden (born 1990, Chelmsford; raised in Oxton, Scotland) is a Scottish actor known for River Cartwright in Slow Horses, Dunkirk, Calibre, Benediction, Olivier and Scottish BAFTA awards, and producing The Outrun.
Jack M. Barrack Hebrew Academy
Jack M. Barrack Hebrew Academy, founded 1946 as Akiba Hebrew Academy, is the first pluralistic Jewish secondary day school in the United States, now a grades 6-12 college-preparatory school in Bryn Mawr, Pennsylvania, renamed in 2007 after a $5 million Barrack Foundation gift.
Jack M. Colwill
Jack M. Colwill is an American family physician and physician-workforce researcher at the University of Missouri, elected to the National Academy of Medicine in 1989.
Jack M. Guralnik
Jack M. Guralnik is an American epidemiologist of aging who developed the Short Physical Performance Battery and is a professor at the University of Maryland.
Jack M. Gwaltney
Jack M. Gwaltney was an American physician-scientist at the University of Virginia who spent four decades studying the common cold, showing rhinoviruses spread mainly by hand transfer.
Jack M. Mochel
Jack M. Mochel is a low-temperature physicist at the University of Illinois at Urbana-Champaign known for third-sound experiments on thin superfluid helium films.
Jack Ma (马云)
Jack Ma (马云, Ma Yun), born 1964 in Hangzhou, former English teacher who founded Alibaba Group in 1999, was its CEO to 2013 and executive chairman to 2019; Ant Group IPO blocked after his October 2020 regulatory speech; now a mentor.
Jack MacGowran
Jack MacGowran was an Irish actor, born in Dublin in 1918, best known as one of Samuel Beckett's foremost interpreters and for films including The Exorcist.
Jack Marriott (footballer)
Jack David Marriott (born 1994, Beverley) is an English forward at Reading in League One; ex-Ipswich, Luton, Peterborough (33-goal 2017-18 golden boot season), Derby, Fleetwood, Sheffield Wednesday, and Wrexham.
Jack Martin (American actor)
Jack Martin (born 1998) is an American actor and comedian from McLean, Virginia, known as Josh Harris on NBC's La Brea, as Josh Teitelbaum in Mindy Kaling's Hulu comedy Not Suitable for Work, and for viral TikTok finance-bro sketches.
Jack McBrayer
Jack McBrayer (born 1973, Macon, Georgia) is an American actor and comedian, Kenneth Parcell on 30 Rock (2006–2013), voice of Fix-It Felix in Wreck-It Ralph, and host of HGTV's Zillow Gone Wild.
Jack McCall
Jack McCall (John McCall, c. 1853–1877), also Broken Nose Jack, was the drifter and gambler who shot Wild Bill Hickok in the back of the head at Nuttal & Mann's Saloon No. 10, Deadwood, on August 2, 1876; acquitted by a miners' court, retried in Yankton, and hanged March 1, 1877.
Jack McCoy
Jack McCoy (John James McCoy) is the fictional Manhattan prosecutor on NBC's Law & Order, played by Sam Waterston 1994-2010 and 2022-2024; Executive ADA, later District Attorney, over 400 episodes, final episode February 22, 2024.
Jack McGurn
Jack "Machine Gun" McGurn, born Vincenzo Gibaldi in Sicily, was Al Capone's chief Chicago hitman, suspected planner of the 1929 St. Valentine's Day Massacre with the "Blonde Alibi" Louise Rolfe, and was shot dead in a bowling alley in 1936.
Jack McKinney (basketball)
Jack McKinney, NBA head coach of the Lakers (1979-80), Pacers, and Kings; his 1979 bicycle accident and coma led Paul Westhead to replace him and launch the Showtime dynasty.
Jack McMullen
Jack McMullen (born 1991, Liverpool) is an English actor and writer, a former child soap actor (Brookside) known for Finn Sharkey in Waterloo Road, Daniel in Time, Ford v Ferrari, Hijack, and Jamie Phelan in This City Is Ours.
Jack McVitie
Jack "the Hat" McVitie (Jack Dennis McVitie, 1932-1967) was a London enforcer in the Kray twins' firm, murdered by Reggie Kray in Stoke Newington in October 1967; the killing anchored the 1969 Old Bailey convictions that ended the Krays.
Jack Medica
Jack Chapman Medica (1914-1985), American freestyle swimmer from Seattle; 1936 Berlin Olympic 400m freestyle champion and double silver medalist; set 11 world records and coached Columbia and Penn.
Jack Metcalfe
Jack Metcalfe (John Patrick Metcalfe, 1912-1994), Australian triple jumper; set a 15.78 m world record in 1935 and won bronze at the 1936 Berlin Olympics, Australia's only medal there; also 1934 and 1938 Empire Games champion.
Jack Monroe
Jack Monroe (born 1988, Melissa Hadjicostas) is a British food writer and anti-poverty campaigner whose 2012 blog A Girl Called Jack documented feeding her son on £10 a week, leading to bestselling budget cookbooks and the Vimes Boots price index.
Jack Moorhouse
Jack Moorhouse (born 2005, Manchester) is a Manchester United academy midfielder and Republic of Ireland U21 international, on loan at Dundee in 2026/27, ruled out for the season with an ACL injury.
Jack Mormon
Jack Mormon is an American term (1835–45) for either a non-Mormon friendly to Latter-day Saints or a lax, nominal Mormon; originally applied to Missouri and Illinois sympathizers, later to nonconforming members.
Jack Morris
Jack Morris is an American professional pitcher who won four World Series titles with three teams and was elected to the Baseball Hall of Fame in 2018.
Jack Myers (algal physiologist)
Jack Edgard Myers (1913–2006) was an American algal physiologist who studied photosynthesis at the University of Texas at Austin and joined the National Academy of Sciences in 1975.
Jack N. Nielsen
Jack N. Nielsen (Jack Norman Nielsen) was an American aerodynamicist known as "the father of missile aerodynamics", who worked at NACA, NASA Ames, and his own firm.