Surname Ihnatowicz (Ігнат 
, Ihnatowicz 
) , all around the world, is quite a rare family name. The surname Ihnatowicz is habitual in Ukraine, where it is quite a rare surname, Poland, where it is a rare surname, and Norway. Not in comparison with a country's population, it is the most numerous in Ukraine, Poland, and the United Kingdom. Also, Ihnatowicz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ігнат | Ukraine, Belarus |
| Ihnatowicz | Norway, United Kingdom, Australia, United States, Poland |
| jan felicjan ihnatowicz UA (b. 1848) |
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aleksander konstanty ihnatowicz-świat GB (b. 1903) |
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| zygmunt ihnatowicz (b. 1878) |
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janusz artur ihnatowicz LT (b. 1929) |
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| zbigniew ihnatowicz Polish architect, PL (b. 1906) |
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| włodzimierz ihnatowicz LV (b. 1909) |
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| edward ihnatowicz Cybernetic sculptor, GB (b. 1926) |
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| ireneusz ihnatowicz Polish historian (1928-2001), PL (b. 1928) |
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| maria ihnatowicz PL (b. 1921) |
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| maria ihnatowicz BY (b. 1937) |
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| ewa ihnatowicz Polish literary historian, PL (b. 1951) |
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| anna ihnatowicz researcher |
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| a. ihnatowicz botanist |
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| aleksander ihnatowicz Polish actor, PL (b. 1984) |
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