Cognomen Weymarn (Weymarn 
) , throughout the world, is a very rare family name. The cognomen Weymarn is habitual in Finland, where it is quite a rare surname, Germany, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, it is commonest in Finland, Germany, and the United States.
| VARIANT | COUNTRY |
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| Weymarn | Germany, Canada, Finland, United Kingdom, United States |
| peter heinrich von weymarn (b. 1749) |
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| matthias friedrich von weymarn (b. 1751) |
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| hermann alexander von weymarn (b. 1791) |
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| gustav johann ferdinand von weymarn (b. 1800) |
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| sofya weymarn (b. 1830) |
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| konstantin wilhelm august von weymarn (b. 1866) |
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| nicolai von weymarn FI (b. 1887) |
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| bruno von weymarn (b. 1899) |
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| balthasar von weymarn (b. 1968) |
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| niklas von weymarn Finnish CEO, FI |
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| linda b von weymarn researcher |
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| dorothea von weymarn |
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