Last name Lachaux (Lachaux 
) , across the world, is quite a rare surname. The surname Lachaux is characteristic of France, where it is quite a rare surname, Switzerland, where it is a rare surname, and Romania. Measured by absolute frequency, the name is most common in France, Romania, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Lachaux | Romania, Australia, Switzerland, United States, France |
| émile lachaux French magistrate, FR (b. 1885) |
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| claude lachaux FR (b. 1932) |
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| jean-pierre lachaux FR (b. 1951) |
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| afsana lachaux British activist, GB |
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| jean-philippe lachaux |
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