20th-century American Jews

Jacob Henry "Buddy" Baer (June 11, 1915 – July 18, 1986) was an American boxer and later an actor with parts in seventeen films, as well as roles on multiple television series in the 1950s and 1960s.In 1941, he came extremely close to boxing stardom at Washington's Griffith Stadium, when in the opinion of most ringside officials, Joe Louis gave him a disqualifying late sixth-round hit in a title match that should have made Baer the world heavyweight champion. He lost to Louis in a rematch for the title the following year but remained solidly ranked among the top heavyweights in the early 1940s. In 2003, Baer was chosen for The Ring magazine's list of 100 greatest punchers of all time. He was the younger brother of boxing heavyweight champion and actor Max Baer, and the uncle of actor Max Baer Jr.

Martin R. "Marty" Frankel (born 1954) is an American financial criminal who conducted a series of investment frauds in the late 20th century, causing hundreds of millions of dollars in losses. He was caught in 1999, and in 2004 was sentenced to 200 months in prison based on over $200 million in proven losses to insurance companies he bought then looted their actuarial reserves; the sentence was reaffirmed in 2006.

Lawrence Frederick Kert (December 5, 1930 – June 5, 1991) was an American actor, singer, and dancer. He is best known for his role of Tony in the original Broadway production of the musical West Side Story. He was nominated for a Tony Award (1971) for his work in the musical comedy Company (1970).

Leonard Emanuel Parker (born Leonard Pearlman; in 1938) is a distinguished professor emeritus of physics and a former director of the Center for Gravitation and Cosmology at the University of Wisconsin–Milwaukee. During the late 1960s, Parker established a new area of physics—quantum field theory in curved spacetime. Specifically, by applying the technique of Bogoliubov transformations to quantum field theory with a changing gravitational field, he discovered the physical mechanism now known as cosmological particle production. His breakthrough discovery has a surprising consequence: the expansion of the universe can create particles out of the vacuum.
His work inspired research by hundreds of physicists and has been cited in more than 2,000 research papers; it was credited in the memoirs of Soviet physicist Andrei Sakharov and helped Stephen Hawking discover the creation of particles by black holes.Along with David Toms of Newcastle University, Parker co-wrote a latest addition to graduate-level textbooks on quantum field theory in curved spacetime, entitled Quantum Field Theory in Curved Spacetime: Quantized Fields and Gravity (Cambridge University Press, 2009, ISBN 978-0-521-87787-9).
He received his PhD from Harvard University in 1967. His advisor was Sidney Coleman.

Paul Bern (born Paul Levy; December 3, 1889 – September 5, 1932) was a German-born American film director, screenwriter, and producer for Metro-Goldwyn-Mayer, where he became the assistant to Irving Thalberg. He helped launch the career of Jean Harlow, whom he married in July 1932; two months later, he was found dead of a gunshot wound, leaving what appeared to be a suicide note. Various alternative theories of his death have been proposed. MGM writer and film producer Samuel Marx believed that he was killed by his ex-common-law wife Dorothy Millette, who jumped to her death from a ferry days afterward.

Eric Anthony Douglas (June 21, 1958 – July 6, 2004) was an American actor and stand-up comedian. Douglas was the youngest son of actor Kirk Douglas and his second wife Anne Buydens. His half brother was actor and producer Michael Douglas. Douglas pursued a career in show business but did not attain the same level of success as his father and siblings. His career was overshadowed by his numerous run-ins with the law and problems with alcohol and drugs.

Bernard Edward Epton (August 25, 1921 – December 13, 1987) was an American politician who served in the Illinois House of Representatives from 1969 to 1983. He is most remembered for his candidacy as the Republican nominee in the close and contentious Chicago mayoral election of 1983.

Leona Roberts Helmsley (born Lena Mindy Rosenthal; July 4, 1920 – August 20, 2007) was an American businesswoman. Her flamboyant personality and reputation for tyrannical behavior earned her the nickname Queen of Mean.After allegations of non-payment were made by contractors hired to improve Helmsley's Connecticut home, she was investigated and convicted of federal income tax evasion and other crimes in 1989. Although having initially received a sentence of 16 years, she was required to serve only 19 months in prison and two months under house arrest. During the trial, a former housekeeper testified that she had heard Helmsley say: "We don't pay taxes; only the little people pay taxes", a quote which was identified with her for the rest of her life.

Maximilian Shulman (March 14, 1919 – August 28, 1988) was an American writer and humorist best known for his television and short story character Dobie Gillis, as well as for best-selling novels.

Isaac Rosenfeld (March 10, 1918 - July 14, 1956) was an American writer who became a prominent member of New York intellectual circles. Rosenfeld wrote one novel (Passage from Home, 1946), which, according to literary critic Marck Shechner, "helped fashion a uniquely American voice by marrying the incisiveness of Mark Twain to the Russian melancholy of Dostoevsky," and many articles for The Nation, Partisan Review, and The New Republic. Some of those articles were posthumously published in a volume titled An Age of Enormity, and his short stories were later published as Alpha and Omega.