Cognomen Csar (Csar 
) , across the world, is a rare family name. The last name Csar is characteristic of Austria, where it is quite a rare surname, New Zealand, where it is a very rare surname, and Australia. Not in comparison with a country's population, this name is the most popular in Austria, the United States, and Germany. More frequently, Csar is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Csar | Guatemala, Austria, Spain, Democratic Republic of the Congo, El Salvador |
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peter csar Austrian politician, AT (b. 1961) |
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| christine csar Austrian actress, AT (b. 1957) |
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| erika csar Austrian field hockey player (1961-2010), AT (b. 1961) |
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| günter csar Austrian Nordic combined skier, AT (b. 1966) |
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| edumbadumba egbula pierre csar politician in DRC |
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| sebastian alexander csar Ph.D. University of Minnesota-Minneapolis 2014 |
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| julia theresa csar Ph.D. Technische Universität Wien 2018 |
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