Cognomen Andreassen (Andreassen 
, Андреассен 
, אנדרסן 
) , across the world, is a common surname. The family name Andreassen is characteristic of Greenland, where it is a common surname, Norway, and Denmark, where it is quite a common surname. Not in comparison with a country's population, this name is the most popular in Norway, Denmark, and the United States.
| VARIANT | COUNTRY |
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| Andreassen | Norway, Greenland, Sweden, United States, Denmark |
| Андреассен | Russia |
| אנדרסן | Israel |
Andreas, Andreasen, Andreasson, Andressen, Andriessen, Andréassen, Andréasson, Андреассон, and אנדראס
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anton matheus andreassen NO (b. 1855) |
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| christian andreassen Norwegian contributing editor and politician, NO (b. 1828) |
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| anthon ole michael andreassen Norwegian missionary (1847-1881) (b. 1847) |
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| hilda andreassen Norwegian missionary (b. 1850) |
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| michael andreassen Norwegian missionary (1858-1892) (b. 1858) |
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olav johan andreassen painter, NO (b. 1909) |
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einar andreassen Norwegian politician and contributing editor (b. 1918) |
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| rikke andreassen Danish hymnwriter (b. 1869) |
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| ragnhild omunda andreassen Norwegian missionary (b. 1869) |
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anders andreassen NO (b. 1909) |
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kjell andreassen Norwegian singer and musician (b. 1937) |
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| kârale andreassen painter (1890-1934), GL (b. 1890) |
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| birger andreassen cyclist, NO (b. 1891) |
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| kristian andreassen Norwegian botanist (1898-1973) (b. 1898) |
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odd arne andreassen Norwegian politician (b. 1950) |
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