Surname Plášek (Plášek 
) , all over the world, is a rare cognomen. The family name Plášek is habitual in Eastern Europe, particularly Czechia, where it is quite a rare surname, and Slovakia, where it is a rare surname.
| VARIANT | COUNTRY |
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| Plášek | Czechia, Slovakia |
| ondřej plášek (b. 1919) |
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| františek plášek (b. 1931) |
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| jaromír plášek researcher (b. 1950) |
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| jiří plášek (b. 1952) |
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| vítězslav plášek botanist, CZ (b. 1972) |
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| otto plášek CZ (b. 1962) |
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| karel plášek Czech ice hockey player (born 1973), CZ (b. 1973) |
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| pavel plášek (b. 1964) |
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| karel plášek Czech ice hockey player (born 2000), CZ |
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