Cognomen Janser (Janser 
) , throughout the world, is quite a rare family name. The surname Janser is habitual in Switzerland, where it is quite a rare surname, Namibia, and Austria. Not in comparison with a country's population, it is commonest in Western Europe, particularly Germany, Switzerland, and Austria. Also, Janser is the forename as well as the last name.
| joseph anton janser CH (b. 1738) |
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peter janser German missionary, DE (b. 1878) |
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| gunnar janser Swedish painter, SE (b. 1919) |
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| rauni janser (b. 1933) |
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| max janser CH (b. 1943) |
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| maureen bailo janser Swiss television presenter, CH (b. 1971) |
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| félice a janser researcher (ORCID 0000-0001-9101-0017) |
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| marion janser DE |
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| malin janser German association football player, DE |
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