Surname Janiszewski (Janiszewski 
, Янишевский 
) , globally, is a common last name. The last name Janiszewski is habitual in Poland, where it is quite a common surname, Ireland, where it is quite a rare surname, and Germany, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Poland, the United States, and Germany. Likewise, Janiszewski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Janiszewski | Germany, United States, Poland, France, Brazil |
| Янишевский | Kazakhstan, Russia, Ukraine, Belarus |
Janischewski, and Yanishevsky
| antoni janiszewski (b. 1728) |
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| jan ludwik janiszewski PL (b. 1778) |
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| leon janiszewski Polish writer, PL (b. 1810) |
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tomasz janiszewski Polish physician, PL (b. 1867) |
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| jan chryzostom janiszewski Polish priest (1818-1891), PL (b. 1818) |
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zygmunt janiszewski Polish mathematician, PL (b. 1888) |
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| aleksander janiszewski BE (b. 1829) |
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lucjan janiszewski Polish officer, UA (b. 1891) |
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tadeusz janiszewski Officer of the Polish Army, PL (b. 1899) |
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| roman janiszewski PL (b. 1854) |
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| józef konstanty janiszewski PL (b. 1855) |
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| stefan janiszewski Polish military officer, PL (b. 1868) |
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jerzy janiszewski Polish journalist, PL (b. 1944) |
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henryk janiszewski ice hockey player, PL (b. 1949) |
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| michał janiszewski born:1901|died:1984|; Janiszewski, Michał; Janiszewski, Michał, 1901- (b. 1901) |
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