Cognomen Koncewicz (Koncewicz 
) , all over the world, is quite a rare last name. The cognomen Koncewicz is habitual in Poland, where it is quite a rare surname, Israel, where it is a rare surname, and Canada, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Germany. Also, Koncewicz is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koncewicz | Germany, France, Poland, United Kingdom, United States |
| ludwik augustyn koncewicz PL (b. 1791) |
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| ludwik koncewicz PL (b. 1791) |
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| jan tomasz koncewicz PL (b. 1795) |
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| łukasz koncewicz PL (b. 1796) |
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| aleksander koncewicz [occupation:Sänger] [dates:1824] [archive:Polskie Archiwum Biograficzne] (b. 1824) |
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| aleksander koncewicz PL (b. 1824) |
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ryszard koncewicz Polish footballer (1911-2001), PL (b. 1911) |
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| aleksandra koncewicz Polish actress, PL (b. 1930) |
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| stanisław koncewicz PL (b. 1922) |
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| jowita koncewicz Polish computer programmer, translator, PL (b. 1935) |
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| tomasz tadeusz koncewicz PL |
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