Cognomen Oortwijn (Oortwijn 
) , across the world, is a rare surname. The last name Oortwijn is characteristic of Netherlands, where it is quite a rare surname, Norway, where it is a rare surname, and Switzerland, where it is a very rare surname. Measured by absolute frequency, the name is most common in Netherlands, Norway, and Germany.
| VARIANT | COUNTRY |
|---|---|
| Oortwijn | Germany, Norway, Switzerland, France, Netherlands |
| hermanus oortwijn BE (b. 1782) |
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| maarten oortwijn NL (b. 1912) |
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| kees oortwijn NL (b. 1961) |
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| saskia oortwijn Ph.D. Katholieke Universiteit Nijmegen 1995 |
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| wija oortwijn researcher (ORCID 0000-0003-4499-8602) |
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| jeroen oortwijn Ph.D. Landbouwuniversiteit Wageningen 1998 |
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| michiel oortwijn (b. 1977) |
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| jan oortwijn |
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