Cognomen Kloosterboer (Kloosterboer 
) , across the world, is a rare last name. The family name Kloosterboer is habitual in Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and Portugal. Not in comparison with a country's population, it is the most numerous in Netherlands, Belgium, and the United States.
| VARIANT | COUNTRY |
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| Kloosterboer | Netherlands, Belgium, Canada, United States, Germany |
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aijolt kloosterboer Dutch politician and farmer, NL (b. 1915) |
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christon kloosterboer Dutch singer & songwriter, NL (b. 1982) |
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marcela kloosterboer Argentine, AR (b. 1983) |
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| klaas kloosterboer Dutch artist, NL (b. 1959) |
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| lorena kloosterboer Dutch painter, NL (b. 1962) |
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| sanne m kloosterboer researcher |
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| berendina kloosterboer |
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