Surname Chateau (Chastel 
, Chateau 
, Château 
) , globally, is a common last name. The surname Chateau is habitual in France, where it is quite a common surname, Eswatini, and Mauritius, where it is quite a rare surname. In absolute terms, it is the most numerous in France, the United States, and Belgium. Also, Chateau is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Chastel | Belgium, Eswatini, Democratic Republic of the Congo, France, United States |
| Chateau | Belgium, Democratic Republic of the Congo, France, United States, South Africa |
| Château | Belgium, France, United States, Canada, Spain |
| ชาโต | Thailand |
| claude chateau FR (b. 1765) |
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| émile chateau French botanist (1866-1952), FR (b. 1866) |
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| gilles chateau French politician, FR (b. 1885) |
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| ludwig chateau German sculptor, DE (b. 1906) |
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| stephane du chateau French architect and engineer, spatial structures specialist, FR (b. 1908) |
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| victor du chateau New Zealand cricketer (1911-2005), NZ (b. 1911) |
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| pierre chateau-jobert French military personnel, FR (b. 1912) |
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| jean chateau French cyclist, FR (b. 1926) |
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| maurice chateau French film director, FR (b. 1931) |
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| eugène chateau (b. 1926) |
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| rené chateau French publisher, FR (b. 1939) |
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karl chateau French rugby union player (1992-), FR (b. 1992) |
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| bernard chateau French politician, FR (b. 1946) |
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| georges chateau French politician, FR (b. 1948) |
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| dominique chateau French philosopher, FR (b. 1948) |
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