Surname Gregorowicz (Gregorowicz 
) , around the world, is a rare cognomen. The last name Gregorowicz is characteristic of Poland, where it is quite a rare surname, Bahrain, where it is a rare surname, and Switzerland. Measured by absolute frequency, it is the most numerous in Poland, the United States, and Romania. Also, Gregorowicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gregorowicz | Brazil, United States, Poland, France, Romania |
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jan kanty gregorowicz PL (b. 1818) |
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| benedykt gregorowicz (1810-1878) (b. 1810) |
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| andrzej gregorowicz PL (b. 1806) |
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| tytus gregorowicz (b. 1810) |
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| karol gregorowicz (b. 1819) |
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| kazimierz gregorowicz Polish lawyer, PL (b. 1833) |
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leon gregorowicz UA (b. 1919) |
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| leonia gregorowicz Polish Righteous Among the Nations, PL (b. 1919) |
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lucas gregorowicz German actor, DE (b. 1976) |
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| jan gregorowicz (b. 1921) |
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dagmara gregorowicz PL |
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| jacek gregorowicz Polish chemist and researcher, PL |
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| dorota gregorowicz Polish cyclist, PL (b. 1989) |
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| piotr gregorowicz |
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| szymon gregorowicz (b. 1994) |
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