Cognomen Looser (Looser 
) , throughout the world, is quite a rare family name. The cognomen Looser is characteristic of Western Europe, particularly Switzerland, where it is quite a common surname, Liechtenstein, and Germany, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Switzerland, Germany, and the United States. Very seldom, Looser is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Looser | Germany, United States, Switzerland, Austria, Myanmar |
| wendelin looser (1720-1790), CH (b. 1720) |
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| gustav looser DE (b. 1847) |
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| simon looser holocaust victim, b. 1864-02-20, CZ (b. 1864) |
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| bertha looser holocaust victim, b. 1870-04-13 (b. 1870) |
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| klara looser holocaust victim, b. 1876-11-25, DE (b. 1876) |
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| elisabeth looser holocaust victim, b. 1876-07-11, CZ (b. 1876) |
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| emil looser (b. 1877) |
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hubert looser Swiss art collector and philanthropist, CH (b. 1938) |
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| guido looser Swiss author (1892-1937), CH (b. 1892) |
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| hans looser (1897-1984), CH (b. 1897) |
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devoney looser American literary and Jane Austen scholar, US (b. 1967) |
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| rolf looser Swiss composer (1920-2001), CH (b. 1920) |
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| hannes looser CH (b. 1919) |
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kilian looser CH (b. 1969) |
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| heinz looser CH (b. 1934) |
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