Last name Walecki (Walecki 
) , across the world, is quite a rare cognomen. The cognomen Walecki is characteristic of Poland, where it is quite a rare surname, Belgium, where it is a rare surname, and Germany. Not in comparison with a country's population, the name is most common in Poland, Germany, and Brazil. Likewise, Walecki is the forename as well as the last name.
| félix walecki French mathematician (1844-1909), FR (b. 1844) |
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| henryk walecki (b. 1907) |
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| wacław józef walecki Polish historian, PL (b. 1947) |
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| jerzy walecki PL (b. 1948) |
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| piotr walecki researcher, PL |
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