Last name Chagnon (Chagnon 
) , worldwide, is quite a common cognomen. The surname Chagnon is habitual in Canada, where it is quite a rare surname, France, and New Zealand. Measured by absolute frequency, it is the most numerous in Canada, the United States, and France.
| VARIANT | COUNTRY |
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| Chagnon | Belgium, United States, France, New Zealand, Canada |
| paschal chagnon Canadian politician, CA (b. 1765) |
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| gustave chagnon (b. 1871) |
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| marie chagnon French Righteous Among the Nations, FR (b. 1883) |
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jacques chagnon Canadian politician, CA (b. 1952) |
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| leon chagnon American baseball player, US (b. 1902) |
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| pierre chagnon FR (b. 1893) |
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patricia chagnon French politician, FR (b. 1963) |
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| vincent-f. chagnon Canadian politician, CA (b. 1915) |
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| andré chagnon Canadian businessman, CA (b. 1928) |
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cheryle chagnon-greyeyes politician, leader of the Green Party of Alberta, CA |
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| jean-yves chagnon geological engineer and professor at Laval University, CA (b. 1934) |
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| napoleon alphonseau chagnon American anthropologist, US (b. 1938) |
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frédéric chagnon professional Canadian football linebacker, CA (b. 1992) |
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| alain chagnon Canadian, born 1948; artist, CA (b. 1948) |
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| claude chagnon Canadian ice hockey player, CA (b. 1948) |
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