Family name Flek (Fleck 
, Flek 
, Флек 
) , globally, is a common surname. The family name Flek is habitual in Austria, where it is quite a common surname, Germany, and Czechia, where it is quite a rare surname. In absolute terms, it is commonest in the United States, Germany, and Brazil. Much less frequently, Flek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Fleck | Germany, Austria, United States, France, Brazil |
| Flek | Germany, Austria, United States, Canada, Brazil |
| Флек | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| volfgang flek CZ (b. 1881) |
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| jindřich flek PL (b. 1896) |
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| karel flek Czech drummer, composer and violoncellist (1908-1970), CZ (b. 1908) |
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| josef flek (b. 1900) |
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| františek flek (b. 1914) |
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alexandr flek CZ (b. 1968) |
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| karel flek (b. 1919) |
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| jaroslav flek CZ (b. 1923) |
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jakub flek Czech ice hockey player, CZ (b. 1992) |
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| rudolf flek CZ (b. 1947) |
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| františek flek CZ (b. 1976) |
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| josef flek CZ (b. 1988) |
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Mr, Olga, Maria, Marta, Marko, Marek, Mirek, Stacy, Slava, Alina, Idan, Anita, Bella, Karel, Pavel, Pawel, Peter, Ravit, Roman, Rusty, Denis, Aneta, David, Ivan, Elza, Ms, Sam, Ran, Jan, Eva, Vã, Ida, Mark, Alex, Irit, Adam, Petr, Rosa, Ross, Lisa, Luba, Jose, John, Jean, Elsa, Kuba, and Diana