Cognomen Klůc (Klůc 
) , worldwide, is a very rare family name. The last name Klůc is habitual in Eastern Europe, particularly Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Klůc | Czechia |
| miroslav klůc Czechoslovak ice hockey player and Olympic athlete (1922-2012), CZ (b. 1922) |
|
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| františek klůc CZ (b. 1924) |
|