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- Jack Newman (New Zealand cricketer) (1902–1996), New Zealand cricketer
- Jack Newman (doctor) (born 1946), Canadian breastfeeding expert
- Jack Newman (English cricketer) (1884–1973), English cricketer
- Jaime Ray Newman (born 1978), American actress and singer
- James H. Newman (born 1956), American astronaut
- James R. Newman (1907–1966), mathematician and mathematical historian
- James W. Newman (1841–1901), Democratic politician in Ohio
- James Newman (actor) (born 1992), American actor
- James Newman (Canadian politician) (1903–1963), Liberal-Labour politician in Ontario, Canada
- James Newman-Newman (1767–1811), British naval officer
- Jay Newman (1948–2007), philosopher
- Jeff Newman (American baseball player) (born 1948), American All Star baseball player and manager
- Jeff Newman (musician) (1942–2004), a pedal steel guitar player and Nashville session musician
- Jim Newman, several people
- Jocelyn Newman (born 1937), Australian Senator for Tasmania
- Joe Newman (trumpeter) (1922–1992), jazz musician
- Joe Newman (basketball) (born 1937), co-founder and CEO of the American Basketball Association
- Joey Newman (born 1976), American film composer, orchestrator, arranger and conductor
- John Henry Newman (1801–1890), English theologian and Cardinal
- John Newman, several people
- Johnny Newman (born 1963), former American professional basketball player
- Jon O. Newman (born 1932), American federal judge
- Joseph Newman (journalist) (1913–1995), American journalist who worked in Japan
- Joseph M. Newman (1909–2006), American film director
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