Cognomen Arentsen (Arentsen 
) , throughout the world, is quite a rare family name. The last name Arentsen is habitual in Netherlands, where it is quite a rare surname, Denmark, and Norway, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Netherlands, the United States, and Denmark.
| VARIANT | COUNTRY |
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| Arentsen | South Africa, Chile, United States, Denmark, Netherlands |
| sigurd arentsen Chilean phytopathologist, CL (b. 1914) |
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| juan j. arentsen (b. 1943) |
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| luke arentsen researcher |
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| corey arentsen college basketball player (2013–2014) Austin Peay |
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| w. arentsen |
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| l.h. arentsen |
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| niek arentsen |
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| g. arentsen |
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| h.h. arentsen |
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