Last name Kladnik (Kladnik 
) , throughout the world, is a rare cognomen. The last name Kladnik is characteristic of Slovenia, where it is quite a common surname, Croatia, where it is quite a rare surname, and Austria, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Slovenia, Germany, and Croatia. Much less frequently, Kladnik is the forename as well as the last name.
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| Kladnik | Germany, Austria, Croatia, Slovenia, United States |
| rudolf kladnik SI (b. 1933) |
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| matjaž kladnik Slovene ski jumper, SI (b. 1975) |
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| gregor kladnik researcher |
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| gregor kladnik Slovene physicist, SI (b. 1981) |
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| ana kladnik SI (b. 1977) |
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| silvester kladnik SI |
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| jerneja kladnik SI |
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| gregor kladnik SI |
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| darinka kladnik SI |
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| tomaž kladnik SI |
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| tone kladnik SI |
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| blaž kladnik SI (b. 1984) |
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| aleš kladnik researcher, SI |
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Mr, Mario, Marko, Matej, Miran, Sanja, Saša, Simon, Aleã, Aleš, Ines, Anita, Carol, Boris, Bojan, Brian, Blaž, Karen, Katja, Peter, Dejan, Anže, Ella, Neã, Nina, Ms, Ana, Ann, Ken, Pia, Nik, Ela, Ema, Eva, Marc, Matt, Miha, Sara, Ales, Alma, Dean, Gaja, Lisa, Jaka, Jure, Tina, Dario, and Darko