Family name Frouin (Frouin 
) , in all the world, is quite a rare surname. The last name Frouin is habitual in France, where it is quite a rare surname, Switzerland, where it is a rare surname, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it is commonest in France, Canada, and Switzerland. Very seldom, Frouin is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Frouin | Canada, Australia, France, United States, Switzerland |
| alexandre frouin (1805-1882) (b. 1805) |
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| charles frouin (b. 1827) |
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| élysée frouin French politician (1883-1964), FR (b. 1883) |
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| michel frouin French politician, FR (b. 1938) |
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| jean-paul frouin French official, FR (b. 1939) |
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| jean-yves frouin FR (b. 1951) |
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| vincent frouin researcher |
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| cédric frouin researcher (ORCID 0000-0003-0591-148X) |
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| marguerite germain marie frouin Peerage person ID=512494 |
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| robert frouin researcher (ORCID 0000-0003-4770-389X) |
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| marine frouin researcher ORCID ID = 0000-0001-5299-1203 |
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| h. frouin botanist |
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| gabriel max marie sebastian frouin Peerage person ID=512495 |
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| frédérique frouin researcher |
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