Cognomen Klavžar (Klavžar 
) , globally, is a very rare family name. The cognomen Klavžar is characteristic of Southern Europe, particularly Slovenia, where it is quite a rare surname, and Croatia, where it is a very rare surname.
| ernest klavžar SI (b. 1841) |
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| milton klavžar IT (b. 1876) |
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| zora klavžar IT (b. 1878) |
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| brane klavžar Slovene musician, SI (b. 1955) |
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| sandi klavžar Slovenian mathematician, SI (b. 1962) |
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| karmen klavžar SI (b. 1969) |
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| polona klavžar researcher (ORCID 0000-0001-6974-2115) |
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| boštjan klavžar Slovene cross-country skier, SI (b. 1990) |
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| regina klavžar SI |
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| nejc klavžar Slovenian basketball player, SI (b. 1999) |
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