Last name Tratnik (Tratnik 
) , in all the world, is quite a rare family name. The family name Tratnik is habitual in Slovenia, where it is quite a common surname, Sierra Leone, where it is quite a rare surname, and Croatia, where it is a rare surname. Not in comparison with a country's population, it is commonest in Slovenia, Sierra Leone, and the United States.
| VARIANT | COUNTRY |
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| Tratnik | Germany, Austria, Sierra Leone, Slovenia, United States |
| valentin tratnik botanist (1801-1876), SI (b. 1801) |
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leopold tratnik SI (b. 1853) |
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fran tratnik SI (b. 1881) |
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bojan tratnik SI (b. 1919) |
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| karel tratnik SI (b. 1869) |
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| josephine tratnik US (b. 1900) |
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| jelka tratnik athlete (1911-1973) (b. 1911) |
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suzana tratnik SI (b. 1963) |
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jan tratnik cyclist, SI (b. 1990) |
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| jože tratnik Slovene judge and politician, SI (b. 1941) |
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| josef tratnik German actor, DE (b. 1947) |
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| mirko tratnik SI (b. 1938) |
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| monika tratnik SI (b. 1955) |
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| matjaž tratnik SI (b. 1957) |
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| alenka tratnik SI (b. 1965) |
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Mr, Tina, Nina, Nejc, Erik, Eiko, Igor, Žan, Marko, Matej, Todd, Mojca, Miran, Mirko, Mitja, Sanja, Shawn, Simon, Sonja, Steve, Spela, Metka, Jana, Luke, Luka, Ms, Jo, Ana, Lek, Lou, Jan, Jim, Eva, Vid, Iva, Ivo, Mary, Maja, Mira, Mike, Miha, Sara, Andy, Anja, Kaja, Dave, Aleks, and Chris