Family name Klár (Klár 
) , around the globe, is a very rare cognomen. The cognomen Klár is characteristic of Eastern Europe, particularly Czechia, where it is a rare surname, and Hungary. Also, Klár is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Klár | Hungary, Czechia |
| karel klár CZ (b. 1866) |
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| klár jános Hungarian economist (1906-1972), HU (b. 1906) |
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| eduard klár CZ (b. 1917) |
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| jan klár CZ (b. 1945) |
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| luboš klár CZ (b. 1970) |
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| milan klár (b. 1974) |
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| petr klarin klár CZ (b. 1979) |
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