Cognomen Lassus (Laso 
, Alas 
, Lasso ) , across the world, is a common family name. The family name Lassus is characteristic of Latin America and the Caribbean, particularly El Salvador, where it is a common surname, Panama, where it is quite a common surname, and British Virgin Islands (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in El Salvador, Colombia, and Philippines. Very seldom, Lassus is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Laso, Lasso | Panama, Colombia, Philippines, Spain, United States |
| Alas | Colombia, Panama, Philippines, United States, El Salvador |
| Lassus | France, Argentina, Spain, United States, Mexico |
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pierre lassus French surgeon, FR (b. 1741) |
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jean-baptiste-antoine lassus French architect, FR (b. 1807) |
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| don carlos de hault de lassus (b. 1750) |
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| jean lassus French archaeologist, FR (b. 1903) |
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pierre lassus FR (b. 1945) |
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francis lassus French drummer, FR (b. 1961) |
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| louis-albert lassus (b. 1916) |
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| bernard lassus (in bewerking); (in bewerking); 1929-11-30; Chamalières, FR (b. 1929) |
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| robert lassus French caricaturist, FR (b. 1930) |
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| arnaud de lassus FR (b. 1921) |
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| genevieve lassus painter (b. 1933) |
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| dominique lassus French diplomat, FR (b. 1938) |
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| marc lassus French entrepreneur and author, FR (b. 1938) |
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nicolas lassus |
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oriane lassus FR (b. 1987) |
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