Surname Giersz (Giersz 
) , worldwide, is a rare family name. The cognomen Giersz is characteristic of Poland, where it is quite a rare surname, Germany, where it is a very rare surname, and the United States. Also, Giersz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Giersz | Germany, France, Poland, United Kingdom, United States |
| marcin giersz PL (b. 1808) |
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adam giersz Polish politician, PL (b. 1947) |
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mirosław giersz Polish astronomer, PL (b. 1956) |
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| witold giersz Polish artist, PL (b. 1927) |
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| andrzej giersz PL (b. 1924) |
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| miłosz giersz researcher |
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| helena giersz Polish filmmaker in USA, US |
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