Cognomen Klosowski (Klosowski 
) , all over the world, is quite a rare surname. The family name Klosowski is habitual in Poland, where it is quite a rare surname, Estonia, where it is a rare surname, and Germany. In absolute terms, it is commonest in Poland, the United States, and Brazil. Also, Klosowski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Klosowski | Poland, Brazil, France, Germany, United States |
| severino antoniovich klosowski (b. 1865) |
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| dolores klosowski All-American Girls Professional Baseball League player, US (b. 1923) |
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| alfred klosowski German sculptor (b. 1927) |
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| jerome m. klosowski (b. 1940) |
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| ana c klosowski researcher |
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| theresa klosowski baseball player |
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| james thomas klosowski Ph.D. State University of New York at Stony Brook 1998 |
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| luiz augusto klosowski Brazilian politician, BR (b. 1985) |
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