Cognomen Lašek (Lašek 
, Лашек 
) , throughout the world, is a very rare surname. The last name Lašek is habitual in Eastern Europe, particularly Czechia, where it is a rare surname, Ukraine, where it is a very rare surname, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Lašek | Czechia |
| Лашек | Russia, Ukraine |
| gotthard josef lašek CZ (b. 1854) |
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| hanuš lašek CZ (b. 1860) |
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| františek lašek Czech medical doctor and historian (1872-1947), CZ (b. 1872) |
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| bedřich ladislav lašek CZ (b. 1863) |
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| františek lašek Czech actor, CZ (b. 1883) |
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| jan lašek CZ (b. 1950) |
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| richard lašek CZ (b. 1954) |
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