Family name Duchastel (Duchastel 
) , in the entire world, is a very rare last name. The family name Duchastel is habitual in Finland, where it is a very rare surname, Canada, and France. In absolute terms, this name is the most popular in Canada, France, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Duchastel | Finland, United States, Canada, France |
Du Chastel, Du Châtel, Duchatel, and Duchâtel
| marie duchastel (b. 1652) |
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| jacques-jean-baptiste duchastel-berthelin French politician, FR (b. 1756) |
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| gaspard-séverin duchastel French deux-sèvres and politician, FR (b. 1766) |
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jules duchastel Canadian sociologist, CA (b. 1943) |
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| simon duchastel BE (b. 1926) |
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| y duchastel researcher |
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