Cognomen Demski (Demski 
) , in all the world, is quite a rare surname. The cognomen Demski is habitual in Poland, where it is quite a rare surname, Germany, and the United States, where it is a rare surname. Also, Demski is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Demski | Germany, Canada, Brazil, United States, Poland |
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georg demski PL (b. 1844) |
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| augustin demski DE (b. 1877) |
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eva demski German author and translator, DE (b. 1944) |
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| władysław demski PL (b. 1884) |
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| sara demski Victim of the Holocaust, PL (b. 1909) |
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| willi demski German association football player (1929-2012), DE (b. 1929) |
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| joel s. demski American academic, US (b. 1940) |
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nic demski Canadian football player, CA (b. 1993) |
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| kamil demski researcher (ORCID 0000-0002-5454-1748), PL |
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| hans demski researcher ORCID ID = 0000-0003-4424-8035 |
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| christina demski researcher, ORCID id # 0000-0002-9215-452X |
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| renee demski researcher |
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| danielle demski American television presenter, US (b. 1981) |
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