Surname Lorentsen (Lorentsen 
) , across the world, is quite a rare last name. The cognomen Lorentsen is habitual in Northern Europe, particularly Norway, where it is quite a common surname, Denmark, and Sweden, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Norway, Denmark, and the United States.
| VARIANT | COUNTRY |
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| Lorentsen | Denmark, Germany, Norway, Sweden, United States |
Laurantzon, Laurentsson, Lorensen, Lorenson, Lorensson, Lorentson, Lorentzen, Lorentzon, Lorentzson, Lorenzen, Лорентцен, Лоренцен, and โลเรนท์เซ่น
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elias lorentsen (b. 1890) |
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| andreas mikal lorentsen Norwegian politician (b. 1862) |
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| rune lorentsen Norwegian wheelchair curler, NO (b. 1961) |
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| yngve lorentsen (b. 1968) |
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| vibeke bruun lorentsen researcher |
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| ruben lorentsen researcher |
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| eirik lorentsen Norwegian cross-country skier (b. 1988) |
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| gina lorentsen Norwegian handball player, NO (b. 1988) |
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| line balschmidt lorentsen |
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| håvard kleven lorentsen Norwegian association football player, NO (b. 1999) |
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| lucas lorentsen Danish cyclist, DK |
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