Cognomen Vidau (Vidau 
) , all over the world, is a rare surname. The family name Vidau is habitual in France, where it is a rare surname, Italy, and Australia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in France, Italy, and Spain. Very seldom, Vidau is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Vidau | Italy, Nigeria, Spain, India, France |
| giuseppe vidau Italian politician, IT (b. 1892) |
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| marija vidau IT (b. 1942) |
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| philippe vidau French politician, FR (b. 1952) |
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| ignacio vidau argüelles ES (b. 1952) |
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| andrea vidau Italian photographer, IT |
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| and.a vidau photographer |
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| zaira vidau SI |
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