Surname Ruszkiewicz (Ruszkiewicz 
) , in all the world, is quite a rare last name. The surname Ruszkiewicz is characteristic of Poland, where it is quite a rare surname, Latvia, where it is a rare surname, and Ireland. Measured by absolute frequency, it is commonest in Poland, the United States, and Germany. Also, Ruszkiewicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ruszkiewicz | Germany, France, United States, United Kingdom, Poland |
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kazimierz ruszkiewicz PL (b. 1836) |
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| józef wilhelm ruszkiewicz PL (b. 1802) |
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| franciszek ruszkiewicz American journalist, US (b. 1875) |
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wojciech ruszkiewicz Polish sportsperson, PL (b. 1970) |
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| marian ruszkiewicz (1933–2007) (b. 1933) |
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| piotr ruszkiewicz Polish linguist, PL (b. 1946) |
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| john j. ruszkiewicz (b. 1950) |
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| aleksandra ruszkiewicz (b. 1968) |
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| andrew ruszkiewicz researcher |
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| joanna a ruszkiewicz researcher ORCID ID = 0000-0003-1093-1362 |
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| dorota m ruszkiewicz researcher |
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| damian ruszkiewicz Polish athletics competitor, PL (b. 1994) |
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