Family name Ganzer (Ganzer 
, Ганзер 
, Ганцер ) , all around the world, is quite a rare surname. The cognomen Ganzer is habitual in Austria, where it is quite a rare surname, Germany, and Croatia. Not in comparison with a country's population, it is the most numerous in Germany, Brazil, and the United States.
| VARIANT | COUNTRY |
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| Ganzer | Germany, Austria, United States, France, Brazil |
| Ганзер | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| Ганцер | Ukraine |
| joseph ganzer (1842-1914) (b. 1842) |
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leopold ganzer Austrian painter (1929-2008), AT (b. 1929) |
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| hanni ganzer German teacher, Righteous Among the Nations, DE (b. 1893) |
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| ernst ganzer German writer (1903-1967), DE (b. 1903) |
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| gerda ganzer German nurse in concentration camp Ravensbrück (1907-?), DE (b. 1907) |
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| karl richard ganzer German author and historian, DE (b. 1909) |
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| alvin ganzer American television director, television producer and screenwriter (1911-2009), US (b. 1911) |
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| erwin ganzer German navy officer and world war II U-boat commander, DE (b. 1912) |
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arno ganzer Austrian composer, AT (b. 1966) |
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| karl ganzer Austrian composer, AT (b. 1920) |
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| gianfranco ganzer Italian association football player, IT (b. 1930) |
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| klaus ganzer German university teacher, DE (b. 1932) |
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| uwe ganzer (b. 1939) |
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| jürgen ganzer German composer, DE (b. 1950) |
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| valdir ganzer Brazilian politician, BR (b. 1955) |
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