Cognomen Lacau (Лако 
, Lacau 
) , in all the world, is quite a rare family name. The surname Lacau is habitual in Bulgaria, where it is quite a rare surname, France, where it is a rare surname, and Romania. In absolute terms, the name is most common in France, Bulgaria, and Brazil. Very seldom, Lacau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Лако | Ukraine, Russia, Bulgaria |
| Lacau | Romania, Brazil, France, Venezuela, United States |
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maría hortensia lacau Argentine educator, writer (1910-2006), AR (b. 1910) |
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| pierre lacau French archaeologist and egyptologist, FR (b. 1873) |
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| maurice lacau FR (b. 1890) |
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| marie-thérèse lacau French official |
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| louis marie alexandre lacau (died 1928) |
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| sébastien lacau |
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Mr, Joao, Jean, Tony, Eloi, Eric, Erna, Vera, Yves, Maria, Marie, Mario, Mauro, Sally, Susan, Serge, Sonia, Alina, Alain, Andre, Carla, Cesar, Jony, Clara, Jose, Luis, Ms, Ed, Sã, Ana, Jim, Eva, Ion, Marc, Mark, Alex, Alan, Anna, Axel, Paul, Paco, Rony, Rene, Remy, Dana, Geni, Leda, Luiz, and Bahia