Cognomen Mesec (Mesec 
) , worldwide, is quite a rare family name. The last name Mesec is characteristic of Slovenia, where it is quite a common surname, Croatia, and Australia, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Croatia, Slovenia, and the United States. Very seldom, Mesec is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mesec | Australia, Germany, United States, Slovenia, Croatia |
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luka mesec Slovenian politician, SI (b. 1987) |
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| marjan mesec ski jumper, SI (b. 1947) |
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| bob mesec college basketball player (1952–1953) Tulsa |
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| vedran mesec association football player, HR (b. 1988) |
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| staša mesec SI |
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| marko mesec SI |
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| bojana mesec SI |
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| vida mesec SI |
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| blaž mesec SI |
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| anton mesec SI |
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| aleš mesec SI |
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Mr, Dora, Gary, Greg, Lana, Leah, Lisa, Lora, Luka, John, Rose, Joan, Jeff, Jure, Tony, Toni, Tina, Nada, Nina, Vera, Ivan, Jody, Polu, Kata, Kari, Ms, Jo, Ana, Amy, Rok, Jan, Jay, Joe, Tim, Iva, Mary, Mark, Maja, Miha, Samo, Sven, Alen, Alan, Avis, Chip, Cody, Maria, and Mario