Last name Koolwijk (Koolwijk 
) , in the entire world, is a rare surname. The cognomen Koolwijk is characteristic of Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and Norway, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Western Europe, particularly Netherlands, Belgium, and Germany.
| a.j. van koolwijk Dutch pastor, archeologist and photographer, NL (b. 1836) |
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| antonius joannes van koolwijk NL (b. 1836) |
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krijn van koolwijk Belgian athletics competitor, BE (b. 1981) |
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ryan koolwijk Dutch professional footballer, NL (b. 1985) |
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hendrik koolwijk |
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wilhelmus melchior van koolwijk |
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pieter koolwijk |
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| reyn van koolwijk NL (b. 1956) |
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| claudia van koolwijk DE (b. 1961) |
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| reinhard van koolwijk (b. 1963) |
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| patrice koolwijk Peerage person ID=360506 |
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| leonieke m e van koolwijk researcher |
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| hendrick koolwijk Peerage person ID=360505 |
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| pieter koolwijk researcher ORCID ID = 0000-0003-0314-6788 |
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| fabienne koolwijk |
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