Family name Cadieu (Cadieu 
) , throughout the world, is quite a rare cognomen. The family name Cadieu is characteristic of France, where it is quite a rare surname, Canada, where it is a rare surname, and Belgium, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in France, the United States, and Canada. Very seldom, Cadieu is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cadieu | Canada, Belgium, United States, Democratic Republic of the Congo, France |
| joseph cadieu FR (b. 1780) |
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| bert cadieu Canadian politician (1903-1990), CA (b. 1903) |
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jean-marie cadieu French rugby union player, FR (b. 1963) |
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| martine cadieu French journalist, music critic and writer (1924-2008), FR (b. 1924) |
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| pierre cadieu Quebec journalist, essayist, and poet, CA |
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| trevor john cadieu Canadian Army lieutenant-general, CA |
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| jeanne cadieu FR (b. 1996) |
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Mr, Joel, Jean, Jeff, Judy, Troy, Nina, Eric, Fred, Frã, John, Ivan, Yves, Marie, Sally, Sarah, Simon, Sylan, Alain, Andre, Anais, Olga, Aurã, Loic, Gary, Ms, Pat, Guy, Lea, Lou, Jim, Ted, Ian, Marc, Lois, Matt, Moon, Anne, Axel, Bert, Kent, Paul, Rose, Rene, Remy, Maud, and Chris