Last name Frois (Frois 
) , in all the world, is quite a common surname. The cognomen Frois is characteristic of Portugal, where it is quite a rare surname, Luxembourg, and Brazil. Not in comparison with a country's population, it most frequently occurs in Brazil, Portugal, and Argentina.
| joao frois (b. 1594) |
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| michel frois French businessperson (1914-2000), FR (b. 1914) |
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| bernard frois French physicist, FR (b. 1943) |
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| antónio frois chess player, PT (b. 1962) |
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| catarina frois Portuguese anthropologist, PT (b. 1976) |
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| domingo andrés frois Argentinian politician, AR |
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| christian frois researcher |
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| christian frois Ph.D. Massachusetts Institute of Technology 2000 |
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| pierre frois |
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| vitor amorim frois chess player |
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