Family name Vaillancourt (Vaillancourt 
) , throughout the world, is a common cognomen. The cognomen Vaillancourt is characteristic of Canada, where it is quite a common surname, New Zealand, where it is quite a rare surname, and the United States.
| VARIANT | COUNTRY |
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| Vaillancourt | Canada, France, New Zealand, Germany, United States |
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janvier-a. vaillancourt Canadian private banker (1851-1928), CA (b. 1851) |
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| cyrille émile vaillancourt Canadian politician (1848-1912), CA (b. 1848) |
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armand vaillancourt Canadian sculptor and painter, CA (b. 1929) |
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gilles vaillancourt Canadian mayor, CA (b. 1941) |
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| cyrille vaillancourt Canadian politician, CA (b. 1892) |
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| honoré vaillancourt Canadian singer (1893-1932), CA (b. 1893) |
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lorraine vaillancourt Canadian pianist, CA (b. 1947) |
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| émile vaillancourt CA (b. 1889) |
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lise vaillancourt Canadian writer, CA (b. 1954) |
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yves vaillancourt Canadian professor, writer and photographer, CA (b. 1960) |
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sarah vaillancourt ice hockey player, CA (b. 1985) |
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sophie vaillancourt Canadian singer, model, and teacher, CA (b. 1986) |
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| jean-eudes vaillancourt Jean-Eudes Vaillancourt. Pianist, conductor, teacher, composer, b Port-Alfred (now La Baie), near Chicoutimi, Que, 16 Aug 1940; B MUS (Laval) 1955. He studied piano 1956-9 at the CMM with Yvonne Hubert and 1959-61 in New York with Rosina Lhévinne. J, CA (b. 1940) |
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| claude vaillancourt Canadian politician, CA (b. 1944) |
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| pauline vaillancourt Canadian soprano, CA (b. 1945) |
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