Surname Loustau (Loustau 
, לוסטו 
) , in the world, is quite a rare cognomen. The cognomen Loustau is characteristic of France, where it is quite a rare surname, Argentina, and Uruguay. Measured by absolute frequency, it is the most numerous in France, Argentina, and the United States. Much less frequently, Loustau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Loustau | France, Uruguay, United States, Argentina, Spain |
| לוסטו | Israel |
| léopold loustau French painter, FR (b. 1815) |
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| marie euphrosine loustau French painter, FR (b. 1831) |
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marcel loustau French rugby union player (1900-1965), FR (b. 1900) |
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jean loustau French rugby union player, FR (b. 1901) |
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félix loustau Argentine footballer (1922-2003), AR (b. 1922) |
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cesar loustau architect, UY (b. 1926) |
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| hugo c. loustau Uruguayan writer, UY (b. 1900) |
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| kléber loustau French politician (1915-2008), FR (b. 1915) |
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| juan carlos loustau Argentine football referee, AR (b. 1947) |
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| gérard loustau French politician, FR (b. 1950) |
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| olivier loustau French actor, FR (b. 1953) |
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| martine loustau French politician, FR (b. 1953) |
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| jean-marc loustau French chess composer, FR (b. 1958) |
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| didier loustau French politician, FR (b. 1965) |
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| axel loustau French politician, FR (b. 1971) |
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