Surname Clech (Clech 
, Клеш 
) , around the globe, is quite a rare family name. The cognomen Clech is characteristic of France, where it is quite a rare surname, Australia, where it is a very rare surname, and Argentina, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in France, Russia, and the United States. More frequently, Clech is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Clech | Australia, Germany, France, United States, Democratic Republic of the Congo |
| Клеш | Russia, Ukraine |
| françois-marie clech French catholic priest and writer (1788-1872), FR (b. 1788) |
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| jean-marie clech French politician and physician (1850-1891), FR (b. 1850) |
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marcel clech French spy, AT (b. 1905) |
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| michel clech French politician, FR (b. 1945) |
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| jean-pierre clech French production designer, FR (b. 1948) |
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| alain clech French politician, FR (b. 1958) |
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| vincent clech French politician, FR (b. 1969) |
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| cédric clech French politician, FR (b. 1977) |
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| lenaïg le clech researcher |
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| lucie clech researcher (ORCID 0000-0002-9243-8442) |
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| arthur clech |
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| jean-baptiste clech |
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| gwendoline clech FR (b. 1988) |
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