Last name Zasada (Zasada 
) , globally, is quite a rare cognomen. The cognomen Zasada is habitual in Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and Belgium. Measured by absolute frequency, it most frequently occurs in Poland, the United States, and Germany. Also, Zasada is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Zasada | Germany, United Kingdom, United States, Poland, Canada |
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sobiesław zasada Polish rally driver, PL (b. 1930) |
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| antoni zasada PL (b. 1905) |
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artur zasada Polish politician, PL (b. 1969) |
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| jerzy zasada Polish politician, PL (b. 1927) |
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| ewa zasada Polish racing driver, PL (b. 1930) |
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| andrzej zasada (b. 1935) |
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| mariusz zasada Polish sportsperson, PL (b. 1954) |
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| tony zasada Canadian rower, CA (b. 1960) |
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category:wiktoria zasada PL |
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| stanisław zasada PL (b. 1961) |
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| michał zasada PL (b. 1969) |
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| julie zasada researcher |
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| s j zasada researcher |
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| magdalena zasada researcher ORCID ID = 0000-0003-0459-7046, PL |
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| inga a zasada researcher (ORCID 0000-0001-6603-3073) |
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