Cognomen Byrtus (Byrtus 
) , in the entire world, is quite a rare family name. The cognomen Byrtus is characteristic of Czechia, where it is quite a rare surname, Slovakia, and El Salvador, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Czechia, the United States, and Slovakia. Very seldom, Byrtus is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Byrtus | Poland, Slovakia, United States, El Salvador, Czechia |
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jan byrtus Czech photographer, CZ (b. 1935) |
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| juraj byrtus CZ (b. 1897) |
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| josef byrtus Czech diplomat, CZ (b. 1941) |
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| josef byrtus (b. 1942) |
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| františek byrtus (b. 1949) |
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| vladislav byrtus (b. 1950) |
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| josef byrtus CZ (b. 1964) |
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| miroslav byrtus researcher |
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| miroslav byrtus (b. 1979) |
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| oldřich byrtus Czech soccer player, CZ (b. 1994) |
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