Surname Nicolajsen (Nicolajsen 
) , all over the world, is a rare cognomen. The last name Nicolajsen is characteristic of Denmark, where it is quite a common surname, Norway, where it is a rare surname, and Canada.
| VARIANT | COUNTRY |
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| Nicolajsen | Denmark, Canada, Norway, United States, Malaysia |
| hans nicolajsen Danish missionary to Palestine for the London Society for Promoting Christianity Among the Jews, DK (b. 1803) |
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| simone nicolajsen Danish association football player |
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| chalotte winther nicolajsen researcher |
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| lena nicolajsen (b. 1975) |
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| jóna nicolajsen Faroese football player (b. 1986) |
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| preben nicolajsen |
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