Family name Gagnier (جانيه 
, Gagnier 
) , globally, is quite a rare surname. The cognomen Gagnier is habitual in Canada, where it is quite a rare surname, New Zealand, where it is a rare surname, and the United States. Measured by absolute frequency, it most frequently occurs in the United States, Canada, and France. Very seldom, Gagnier is the forename as well as the last name.
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| جانيه | Yemen, Palestinian Territory |
| Gagnier | United Kingdom, United States, Canada, France, New Zealand |
| john gagnier French orientalist, FR (b. 1670) |
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| francois registre gagnier (b. 1796) |
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armand gagnier Canadian clarinetist (1895-1952), CA (b. 1895) |
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| joseph gagnier Canadian musician, CA (b. 1854) |
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claire gagnier Canadian singer and opera singer, CA (b. 1924) |
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| ed gagnier baseball player (1882-1946), FR (b. 1882) |
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| jean-josaphat gagnier Canadian musician, CA (b. 1885) |
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ed gagnier American gymnast and gymnastics coach, CA (b. 1936) |
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| guillaume gagnier Canadian hornist and double-bassist, CA (b. 1890) |
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| rené gagnier Canadian conductor, composer, euphonium player, violinist, and music educator, CA (b. 1892) |
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| ernest gagnier Ernest Gagnier. Cellist, oboist, b Montreal 12 May 1898, d there 2 May 1931. After some initial work with his father, Joseph, he studied the cello with Raoul Duquette and Napoléon Dansereau and the oboe with Léon Kaster. Ernest Gagnier. Cellist, ob, CA (b. 1898) |
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| lucien gagnier Canadian musician, CA (b. 1900) |
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| hélène gagnier French Righteous Among the Nations, FR (b. 1913) |
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| roland gagnier CA (b. 1905) |
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| gaston gagnier CA (b. 1906) |
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