Cognomen Janusz (Janusz 
, Януш 
, יאנוש 
) , worldwide, is a widespread family name. The family name Janusz is characteristic of Poland, where it is a prevalent surname, Eswatini, where it is quite a rare surname, and Ukraine. Not in comparison with a country's population, it is the most numerous in Poland, Ukraine, and the United States. Much less frequently, Janusz is the forename as well as the last name.
| anton janusz (1820-1861) (b. 1820) |
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stanisław janusz Polish politician, PL (b. 1890) |
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antoni janusz Polish aviator, balloonist, officer of the Polish Air Force, GB (b. 1902) |
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| edward janusz UA (b. 1850) |
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edmund janusz Polish politician (1928-2009), PL (b. 1928) |
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| jan janusz Polish actor, PL (b. 1883) |
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kazimierz janusz PL (b. 1925) |
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juliusz janusz polish apostolic nuncio, PL (b. 1944) |
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| marian janusz PL (b. 1905) |
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grzegorz janusz Polish jurist and historian, PL (b. 1970) |
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| antoni janusz Polish biologist, PL (b. 1929) |
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aleksandra maria janusz-kamińska Polish writer, molecular biologist, PL (b. 1980) |
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mikołaj janusz Polish musician, PL (b. 1982) |
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| tadeusz janusz Polish economist, PL (b. 1937) |
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| ewald janusz Polish canoeist (1940-2017), PL (b. 1940) |
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