Cognomen Janowicz (Janowicz 
, Янович 
, Яновіч ) , throughout the world, is a common surname. The last name Janowicz is characteristic of Eastern Europe, particularly Belarus, where it is quite a common surname, Moldova, and Poland, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Belarus, Russia, and Poland. Also, Janowicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Janowicz | United States, France, Poland, Germany, Israel |
| Янович | Ukraine, Kazakhstan, Moldova, Belarus, Russia |
| Яновіч | Ukraine |
| alojzy janowicz FR (b. 1792) |
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| andrzej janowicz UA (b. 1830) |
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| antoni janowicz (b. 1839) |
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| leon janowicz born 1858; died 1902 (b. 1858) |
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| kazimierz janowicz UA (b. 1857) |
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zbigniew janowicz Polish jurist, PL (b. 1921) |
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| feliks janowicz Polish trade unionist (1884-1962), PL (b. 1884) |
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| władysław janowicz (b. 1886) |
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| jan janowicz LT (b. 1893) |
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| antoni janowicz (b. 1905) |
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| bernard janowicz (b. 1908) |
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| leon janowicz VIAF[76385687] LCAuth[nr90025037] (b. 1925) |
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| vic janowicz Player of American football (1930-1996), US (b. 1930) |
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| mula janowicz holocaust victim, b. 1933, PL (b. 1933) |
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| luba janowicz holocaust victim, b. 1935, PL (b. 1935) |
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