Cognomen Belej (Belej 
, Белей 
) , in the world, is quite a rare surname. The cognomen Belej is characteristic of Slovakia, where it is quite a rare surname, Ukraine, and Slovenia. Measured by absolute frequency, the name is most common in Eastern Europe, particularly Ukraine, Slovakia, and Russia. Very seldom, Belej is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Belej | Argentina, Slovakia, Czechia, Poland, Slovenia |
| Белей | Kazakhstan, Russia, Ukraine, Belarus |
| janez belej SI (b. 1919) |
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| jan belej SK (b. 1924) |
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| michal belej (b. 1934) |
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| kamil belej (b. 1942) |
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| ľubomír belej researcher |
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| kamil belej (b. 1972) |
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| michal belej Czech soccer player, CZ (b. 1982) |
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| polonca belej SI |
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| marko belej SI |
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Mr, Karen, Katie, Paula, Peter, Roman, David, Donna, Dusan, Jorge, Chris, Jozef, Julia, Julio, Juraj, Tanja, Nadia, Vasil, Filip, Marian, Martin, Jerry, Steve, Susan, Matej, Sue, Ana, Rok, Jan, Jã, Marc, Andy, Anna, Karl, Prue, Jane, Joze, Juan, Ján, Tina, Nick, Fero, Ivan, Omar, Marko, Marek, Matevž, and Monica