Last name Antosiewicz (Antosiewicz 
) , throughout the world, is quite a rare family name. The cognomen Antosiewicz is characteristic of Poland, where it is quite a rare surname, Switzerland, where it is a rare surname, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Poland, the United States, and the United Kingdom. More frequently, Antosiewicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Antosiewicz | United Kingdom, Italy, Switzerland, United States, Poland |
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edvard antosiewicz Yugoslav gymnast (1902-1960), SI (b. 1902) |
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| wiktoria antosiewicz Polish Righteous Among the Nations, PL (b. 1896) |
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| feliks antosiewicz Polish Righteous Among the Nations, PL (b. 1903) |
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| stefan antosiewicz PL (b. 1918) |
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| kazimierz antosiewicz PL (b. 1919) |
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| henry a. antosiewicz (b. 1925) |
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| jan antosiewicz Polish physicist, PL (b. 1954) |
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| andrzej antosiewicz PL (b. 1953) |
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| jędrzej antosiewicz researcher, PL |
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| tomasz antosiewicz Polish physicist, PL |
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| danuta antosiewicz Polish botanist, PL |
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| danuta maria antosiewicz researcher |
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| piotr antosiewicz researcher (ORCID 0000-0001-9045-4687) |
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| henry a. antosiewicz Dr. phil. Universität Wien 1947 |
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| justyna antosiewicz Polish sportsperson, PL (b. 1996) |
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