Last name Lachat (Lachat 
) , globally, is quite a rare family name. The cognomen Lachat is habitual in Western Europe, particularly Switzerland, where it is quite a common surname, France, where it is quite a rare surname, and Belgium. In absolute terms, this name is the most popular in Switzerland, France, and the United States. Very seldom, Lachat is the forename as well as the last name.
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| Lachat | Belgium, Switzerland, United States, Argentina, France |
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eugène lachat Swiss priest and catholic bishop (1819-1886), CH (b. 1819) |
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| jean-françois lachat (1807-1875), CH (b. 1807) |
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| jean-louis lachat French actor, FR (b. 1846) |
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georges lachat French bicycle racer (1910-1992), FR (b. 1910) |
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| louis françois lachat French painter, FR (b. 1873) |
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| paul lachat (1910-1984), CH (b. 1910) |
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| joseph lachat CH (b. 1908) |
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cédric lachat Swiss rock climber, CH (b. 1984) |
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| françois lachat Swiss politician, CH (b. 1942) |
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| pierre lachat (b. 1940) |
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| vincent lachat Swiss trombonist, CH (b. 1961) |
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| joão-josé lachat researcher |
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| mario lachat researcher |
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| carl lachat researcher |
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| camille lachat researcher |
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