Last name Viau (비오 
, Viau 
) , throughout the world, is quite a common surname. The family name Viau is habitual in Canada, where it is quite a rare surname, Malaysia, and France. Measured by absolute frequency, it is the most numerous in Canada, France, and the United States. Very seldom, Viau is the forename as well as the last name.
| VARIANT | COUNTRY |
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| 비오 | South Korea |
| Viau | Guatemala, Malaysia, France, Canada, United States |
| michel viau 4 Dec 1675 Longueuil, Québec - 17 Feb 1720 Longueuil, Québec (b. 1675) |
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| marguerite viau 19 Mar 1706 Longueuil, Québec - (b. 1706) |
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fortuné viau French Painter XIX Century, FR (b. 1812) |
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george viau French art collector and dentist (1855-1939), FR (b. 1855) |
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| rené viau FR (b. 1799) |
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raphaël viau French journalist, FR (b. 1862) |
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dalbé viau Canadian architect (1881-1938), CA (b. 1881) |
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| charles-théodore viau Canadian industrialist, CA (b. 1843) |
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roger viau Canadian writer (1906-1986), CA (b. 1906) |
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jacques viau Canadian jurist and lawyer (1919-2003), CA (b. 1919) |
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roberto viau Argentine basketball player, AR (b. 1931) |
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| joseph dalbé viau (b. 1881) |
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marcel viau theologian and university professor, CA (b. 1948) |
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| fernand viau Canadian politician, CA (b. 1909) |
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| albert viau Canadian opera singer, CA (b. 1910) |
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