Surname Petek (Petek 
, Petsek 
, Петек 
) , in the world, is a common cognomen. The cognomen Petek is habitual in Slovenia, where it is a common surname, Croatia, where it is quite a common surname, and Turkey, where it is quite a rare surname. Very seldom, Petek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Petek | Germany, United States, Slovenia, Turkey, Croatia |
| Petsek | Thailand, India |
| Петек | Russia, Ukraine |
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franc petek Austrian politician and physician (1885-1965), AT (b. 1885) |
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jože petek SI (b. 1912) |
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miro petek Slovene journalist and politician, SI (b. 1959) |
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| mario petek author (1919-2008) (b. 1919) |
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franci petek ski jumper, SI (b. 1971) |
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| max petek SI (b. 1913) |
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| jože petek SI (b. 1920) |
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| mihael petek SI (b. 1922) |
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| marija petek SI (b. 1922) |
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| ryszard petek Polish sportsperson (1943-2018), PL (b. 1943) |
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| vladimir petek (b. 1940) |
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| milan petek Slovene economist, SI (b. 1950) |
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| peter petek SI (b. 1944) |
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| franc petek SI (b. 1945) |
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| hrvoje petek physics researcher, HR (b. 1958) |
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