Last name Klossner (Klossner 
) , around the world, is quite a rare cognomen. The cognomen Klossner is habitual in Switzerland, where it is quite a rare surname, Liechtenstein, and Finland, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Switzerland, the United States, and Germany. Very seldom, Klossner is the forename as well as the last name.
| jacob klossner, jr. American politician – Minnesota -House 1878 (District 34); House 1881-82 (District 34), US (b. 1845) |
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| alexander klossner FI (b. 1894) |
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| michael klossner author (*1946), US (b. 1946) |
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| frantiček klossner Swiss artist, CH (b. 1960) |
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| rahel klossner researcher (ORCID 0000-0003-1615-156X) |
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| stephan klossner Swiss association football referee, CH (b. 1981) |
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| herbert klossner |
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