Last name Nieuwkoop (Nieuwkoop 
) , around the globe, is quite a rare cognomen. The last name Nieuwkoop is habitual in Netherlands, where it is quite a rare surname, New Zealand, where it is a rare surname, and Sweden. Measured by absolute frequency, it most frequently occurs in Netherlands, the United States, and Germany. Much less frequently, Nieuwkoop is the forename as well as the last name.
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| Nieuwkoop | Netherlands, Canada, Sweden, United States, Germany |
| johan van vianen heer van noordeloos en nieuwkoop (1355-1440) (b. 1355) |
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| alberta van nieuwkoop Dutch Righteous Among the Nations, NL (b. 1903) |
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| pieter van nieuwkoop NL (b. 1902) |
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| pieter nieuwkoop Dutch university teacher (1917-1996), NL (b. 1917) |
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bart nieuwkoop Dutch association football player, NL (b. 1996) |
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| hans van nieuwkoop (b. 1948) |
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| nella j nieuwkoop researcher |
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| andrew j nieuwkoop researcher |
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| cees van nieuwkoop researcher |
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| thijs nieuwkoop researcher ORCID ID = 0000-0002-1969-3084 |
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| jacobus van nieuwkoop particle physicist in Canada |
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| richard van nieuwkoop Dutch football player, NL (b. 1987) |
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| peter nieuwkoop |
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| aart nieuwkoop |
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