Surname Trobec (Trobec 
) , throughout the world, is a rare cognomen. The cognomen Trobec is habitual in Slovenia, where it is quite a common surname, Croatia, where it is a rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Slovenia, Argentina, and the United States. Much less frequently, Trobec is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Trobec | Italy, Argentina, United States, Australia, Slovenia |
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james trobec Catholic bishop (1838-1921), AT (b. 1838) |
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| anton trobec IT (b. 1845) |
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duša trobec bučan Slovene judge, SI (b. 1958) |
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neža trobec Slovene singer, SI (b. 1979) |
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| metod trobec Slovenian serial killer, SI (b. 1948) |
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| roman trobec researcher (ORCID 0000-0001-8986-489X), SI (b. 1953) |
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| jože trobec SI (b. 1948) |
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| irena trobec SI (b. 1951) |
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| ana trobec researcher |
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| marjeta trobec SI (b. 1976) |
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| katja trobec SI |
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| tajan trobec SI |
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| barbara trobec SI |
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| anja trobec SI (b. 1988) |
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Mr, Lisa, Luis, Jaka, John, Jean, Judi, Teja, Tina, Tine, Nika, Nina, Elsa, Erik, Erin, Irma, Ivan, Maria, Mario, Marco, Matej, Mabel, Leah, Lara, Gene, Dare, Ms, Ana, Amy, Pam, Jay, Tom, Tim, Mary, Mark, Maca, Molly, Maja, Seth, Alex, Anna, Anne, Anja, Cody, Cris, Bill, Paul, Rosa, Miha, and Metod