Family name Vassal (Vasal 
, Vassal 
, Vasalo 
) , in all the world, is quite a rare cognomen. The surname Vassal is characteristic of France, where it is quite a rare surname, Israel, and Portugal. In absolute terms, it is commonest in France, India, and Israel. Much less frequently, Vassal is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vasal | Spain, Israel, India, Canada, United States |
| Vassal | Portugal, France, India, United States, Democratic Republic of the Congo |
| Vasalo | Brazil, Spain, Argentina, India, United States |
| Vazal | Germany, United States, India |
| jean-antoine hubert vassal French financier and art collector; 1741-1782, FR (b. 1741) |
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| françois vassal de monviel CA (b. 1759) |
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| jacques claude roman vassal French politician, FR (b. 1770) |
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| pierre gérard vassal FR (b. 1769) |
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| rené vassal (b. 1780) |
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| rené claire vassal FR (b. 1780) |
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| élisabeth vassal (b. 1795) |
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| jean françois vassal FR (b. 1853) |
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| joseph vassal French physician (b. 1867) |
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| victor vassal French lawyer and official (1870-1915), FR (b. 1870) |
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| auguste vassal FR (b. 1864) |
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| jean vassal French politician, FR (b. 1876) |
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| gabrielle maud vassal British naturalist, GB (b. 1880) |
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lucien vassal French writer, FR (b. 1937) |
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jean-philippe vassal French architect, FR (b. 1954) |
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