Last name Gennes (Жен 
, Gennes 
) , in the world, is a rare surname. The surname Gennes is characteristic of Kyrgyzstan, where it is a rare surname, Switzerland, and Kazakhstan, where it is a very rare surname. Measured by absolute frequency, the name is most common in Russia, Germany, and the United States. Also, Gennes is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Жен | Ukraine, Russia, Kyrgyzstan, Kazakhstan |
| Gennes | United States, France, Philippines, Germany, Brazil |
| jean-baptiste de gennes French naval officer, FR (b. 1656) |
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| guillaume joseph pelisson de gennes French politician, FR (b. 1753) |
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| charles dubois de gennes French writer and journalist, FR (b. 1814) |
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otto gennes German banker, DE (b. 1874) |
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| heinrich gennes DE (b. 1871) |
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pierre-gilles de gennes French physicist, FR (b. 1932) |
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| jean de gennes French flying ace, FR (b. 1895) |
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| lucien de gennes (b. 1892) |
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| jean-luc de gennes FR (b. 1927) |
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| marie-christine picard de gennes FR (b. 1958) |
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| marguerite de gennes - 6 Mar 1581 |
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| marie-jean de gennes |
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| christian de gennes |
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| marc de gennes researcher, FR (b. 1991) |
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