Cognomen Krzák (Krzák 
) , all over the world, is a very rare surname. The family name Krzák is habitual in Eastern Europe, particularly Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Krzák | Czechia |
| rudolf krzák Czech soldier, CZ (b. 1914) |
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| severín krzák AT (b. 1916) |
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| jozef krzák SK (b. 1937) |
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