Last name Westerdijk (Westerdijk 
) , around the world, is a rare family name. The surname Westerdijk is habitual in Netherlands, where it is quite a rare surname, Poland, where it is a very rare surname, and Germany.
| VARIANT | COUNTRY |
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| Westerdijk | Netherlands, United Kingdom, Germany, Poland, Spain |
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jan westerdijk Dutch politician (1860-1934), NL (b. 1860) |
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johanna westerdijk Dutch botanist, plant pathologist and mycologist (1883-1961), NL (b. 1883) |
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| j.b. westerdijk (b. 1917) |
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| peter westerdijk (b. 1946) |
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| suzanne westerdijk Dutch Righteous Among the Nations, NL |
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| kim westerdijk researcher (ORCID 0000-0003-3512-4671) |
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| heinrich westerdijk Dutch Righteous Among the Nations, NL |
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