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- James Gray (disambiguation):
- James Gray (UK politician), British politician
- James Gray (movie maker), film maker
- James L Gray, Scottish turbine design engineer
- James Lorne Gray, Canadian president of Atomic Energy of Canada Limited
- James Gray (film director)
- James H. Gray
- James M. Gray (1851–1935), Bishop in the Reformed Episcopal Church, Bible scholar, preacher, and poet
- Jim Gray (computer scientist) (James N. Gray), Microsoft researcher, lost at sea
- James P. Gray, presiding judge of the Superior Court of Orange County, California
- Jamie Gray, Scottish murderer
- Jason Gray-Stanford, Canadian actor
- Jeffrey Alan Gray, British psychologist
- Jerry Gray, American football player
- Jerry Gray (arranger), (1915–1976), arranger, composer, and conductor
- Jim Gray (sportscaster), an American sportscaster
- Jim Gray (UDA member), leader of the Ulster Defence Association in Northern Ireland
- John Gray (disambiguation):
- John N. Gray (born 1948), British political philosopher and professor
- John Gray (U.S. author) (born 1951), author best known for his book Men are from Mars, Women are from Venus
- John Gray (North Dakota), (1877–1952), North Dakota State Treasurer
- John Gray (New Zealand politician) (fl. 1854-1855), member of the New Zealand Parliament
- John Edward Gray (1800–1875), British zoologist
- John Gray (American Revolutionary War) (1764–1868), U.S. soldier, supposedly the longest surviving veteran of the war
- John MacLachlan Gray (born 1946), Canadian playwright, composer, and performer
- John Gray (poet) (1866–1934), English poet and priest
- John Gray (director) (fl. 1982–present), U.S. writer and director
- John Gray (Canadian author) (fl. 2003–present), biographer and former newspaper bureau chief author
- John Gray (banker) (c. 1755-1829), president of the Bank of Montreal
- John Gray (ice hockey), ice hockey player in the World Hockey Association
- John Franklin Gray, (1804–1881) was an American educator and physician and the first practitioner of homoeopathy in the United States
- John Hamilton Gray (Prince Edward Island politician) Canadian politician and one of the Fathers of Confederation
- John Hamilton Gray (New Brunswick politician), Canadian politician, jurist and one of the Fathers of Confederation
- John de Grey, Bishop of Norwich in the English county of Norfolk
- Johnny Gray, American 800m runner
- Joseph Anthony Gray, US Congressman from Pennsylvania
- Joseph M. M. Gray, Chancellor of American University from 1933 until 1941
- Josh Gray, English footballer
- Julian Gray, English footballer
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