Surname Maciejewicz (Maciejewicz 
) , in all the world, is a rare cognomen. The last name Maciejewicz is characteristic of Poland, where it is quite a rare surname, Germany, where it is a very rare surname, and Argentina. Not in comparison with a country's population, it is the most numerous in Poland, Germany, and the United States. Also, Maciejewicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Maciejewicz | United Kingdom, Argentina, United States, Poland, Germany |
| janusz maciejewicz PL (b. 1931) |
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| paweł maciejewicz Polish sportsperson, PL (b. 1980) |
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| piotr maciejewicz researcher |
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| filip maciejewicz film director |
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