Surname Bortnowski (Bortnowski 
) , all over the world, is a rare family name. The family name Bortnowski is habitual in Poland, where it is a rare surname, Israel, and Australia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Poland, the United States, and France. Likewise, Bortnowski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Bortnowski | France, Argentina, Poland, United States, Israel |
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władysław bortnowski Polish historian and general, PL (b. 1891) |
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bronisław bortnowski Polish politician, PL (b. 1894) |
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marcin bortnowski Polish composer, PL (b. 1972) |
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| stanisław bortnowski Polish pedagogue, PL (b. 1935) |
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| zbigniew bortnowski PL (b. 1934) |
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| aleksander bortnowski (b. 1950) |
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| adam bortnowski PL (b. 1971) |
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