Cognomen Kacprzyk (Kacprzyk 
) , all around the world, is quite a rare last name. The surname Kacprzyk is habitual in Poland, where it is quite a rare surname, Norway, where it is a very rare surname, and Germany. Not in comparison with a country's population, it is the most numerous in Poland, the United States, and Germany. More prevalently, Kacprzyk is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kacprzyk | Germany, France, Poland, United Kingdom, United States |
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janusz kacprzyk Polish researcher in computational intelligence, PL (b. 1947) |
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| feliks kacprzyk PL (b. 1946) |
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| artur kacprzyk researcher (ORCID 0000-0002-9447-173X) |
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| joanna kacprzyk researcher ORCID ID = 0000-0003-1054-2367 |
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| artur kacprzyk PL |
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| agnieszka kacprzyk (b. 1980) |
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