Cognomen Lahaut (Lahaut 
, Ляо 
) , around the globe, is a rare family name. The last name Lahaut is habitual in Western Europe, particularly Belgium, where it is quite a rare surname, France, where it is a rare surname, and Netherlands. Much less frequently, Lahaut is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Lahaut | India, France, Belgium, Democratic Republic of the Congo, Netherlands |
| Ляо | Ukraine, Russia, Kazakhstan |
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julien lahaut Belgian politician (1884-1950), BE (b. 1884) |
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pierre lahaut Belgian painter (1931-2013), BE (b. 1931) |
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jean claude lahaut BE |
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| paul-etienne lahaut BE |
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| francois lahaut BE |
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