Cognomen Mroczkowski (Mroczkowski 
) , in all the world, is quite a rare surname. The last name Mroczkowski is habitual in Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and Czechia. In absolute terms, it most frequently occurs in Poland, the United States, and France. Likewise, Mroczkowski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Mroczkowski | Poland, Australia, France, Germany, United States |
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august mroczkowski Polish teacher, PL (b. 1845) |
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aleksander mroczkowski Polish painter (1850-1927), PL (b. 1850) |
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| zygmunt mroczkowski Polish physician and community leader (b. 1837) |
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antoni mroczkowski Polish fighter pilot and officer (1896-1970), PL (b. 1896) |
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| tadeusz mroczkowski (b. 1863) |
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| aleksander mroczkowski Officer of the Polish Army, PL (b. 1893) |
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ireneusz mroczkowski Polish Catholic priest and theologist, PL (b. 1949) |
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| lucjan mroczkowski PL (b. 1890) |
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| przemysław mroczkowski Polish historian, PL (b. 1915) |
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| józef mroczkowski (b. 1910) |
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| benedykt maciej mroczkowski Polish entomologist (1927-2007), PL (b. 1927) |
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| władysław mroczkowski Polish historian, PL (b. 1930) |
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| tadeusz mroczkowski (b. 1920) |
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| arie mroczkowski holocaust victim, b. 1933, PL (b. 1933) |
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grzegorz mroczkowski PL |
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