Cognomen Koloc (Koloc 
) , all around the world, is a rare last name. The cognomen Koloc is characteristic of Czechia, where it is quite a rare surname, Estonia, where it is a rare surname, and Austria. In absolute terms, this name is the most popular in Czechia, the United States, and Germany.
| VARIANT | COUNTRY |
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| Koloc | Austria, Germany, Estonia, Czechia, United States |
| kurt koloc DE (b. 1904) |
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| jaroslav koloc CZ (b. 1920) |
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| miroslav koloc (b. 1936) |
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| bonnie koloc American singer-songwriter, US (b. 1946) |
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| miroslav koloc CZ (b. 1947) |
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| martin koloc CZ (b. 1967) |
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| tomáš koloc CZ (b. 1977) |
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| jakub koloc Czech rower, CZ (b. 1991) |
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| aliyyah koloc Czech racecar driver, CZ |
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| yasmeen koloc Czech racecar driver, CZ |
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Mr, Pavel, Peter, Renee, Darcy, David, Diana, Laura, Linda, James, Jamie, Jakub, Joann, Julie, Jiři, Trina, Nancy, Emily, Eydie, Hanna, Filip, Wayne, Betty, Cindy, Chris, Arien, Mã, Pam, Dan, Lee, Jan, Jim, Mary, Mark, Alan, Anna, Martin, Paul, Dawn, Drew, Gene, Lisa, John, Jodi, Tony, Milan, Míra, Scott, Petr, and Melisa