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Jess Phillips | British politician (born 1981) |
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Jet Li | Chinese-Singaporean martial artist and actor |
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Jewel Staite | Canadian actress |
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Jhené Aiko | American R&B singer (born 1988) |
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Jiang Xueqin | Chinese-Canadian educator known for geopolitical predictions |
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Jiang Zemin | former General Secretary of the Chinese Communist Party (1926–2022) |
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Jim Jefferies | Australian-American stand-up comedian, actor and writer |
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Jimmy Carr | British comedian and humourist |
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Jim Simons | American mathematician and hedge fund manager (1938–2024) |
| JC | Jin Cheongwoo | fictional character from Under the Greenlight |
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J. J. Abrams | American filmmaker (born 1966) |
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J. Jonah Jameson | fictional character from Spider-Man 3 |
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Joachim von Ribbentrop | Reich Minister for Foreign Affairs |
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Joan Jett | American rock musician |
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Joanna Newsom | American musician (b. 1982) |
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Joe Jackson | American music manager, father of the Jackson family (1928–2018) |
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Joel David Hamkins | American mathematician |
| JD | Joel Davis | Political and philosophical commentary YouTuber |
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Joel McHale | American actor and comedian |
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Joe Scarborough | American television host and politician (born 1963) |
| JS | Joe Schmid | agnostic philosophy of religion YouTuber, aka Majesty of Reason |
| JS | Joe Swanson | fictional character from Family Guy |
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Johan Cruyff | Dutch footballer and manager (1947–2016) |
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Johann Gottlieb Fichte | German philosopher (1762–1814) |
| JB | John Beebe | American psychologist |
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John Boehner | 53rd Speaker of the U.S. House of Representatives from 2011 to 2015 |
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John Browning | firearms designer of the United States (1855-1926) |
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John Carmack | American computer programmer and video game developer (born 1970) |
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John C. Lilly | American physician (1915-2001) |
| JC | John Curtice | political scientist |
| JD | John Doyle | conservative political youtuber |
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John D. Rockefeller | American industrialist and philanthropist (1839–1937) |
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John Frusciante | American guitarist |
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John Goodman | American actor |
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John Howard | Prime Minister of Australia from 1996 to 2007 |
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John Hurt | British actor (1940–2017) |
| JK | John Keating | fictional character from Dead Poets Society |
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John Keats | English Romantic poet (1795–1821) |
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John Legend | American singer-songwriter |
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John Linnell | American musician (born 1959) |
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John Locke | English philosopher and physician (1632-1704) |
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John Mayer | American musician (born 1977) |
| JK | Johnny Klebitz | fictional character from Grand Theft Auto |
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John of Kronstadt | Russian saint (1829–1908) |
| JR | John Redcorn | fictional character from King of the Hill |
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John Searle | American philosopher (1932–2025) |
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John Stewart | fictional character from Injustice: Gods Among Us |
| JTR | John T. Reed | American businessman |
| JV | John Vervaeke | |
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John VI of Portugal | King of the United Kingdom of Portugal, Brazil and the Algarves from 1816 to 1825 |