Family name Koolhaas (Koolhaas 
) , all around the world, is a rare last name. The last name Koolhaas is characteristic of Netherlands, where it is quite a rare surname, Uruguay, where it is a rare surname, and New Zealand. In absolute terms, it most frequently occurs in Netherlands, the United States, and Uruguay.
| VARIANT | COUNTRY |
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| Koolhaas | Uruguay, Netherlands, Canada, Germany, United States |
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willem koolhaas university teacher (1709-1773), NL (b. 1709) |
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anton koolhaas Dutch writer, NL (b. 1912) |
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| gerardus koolhaas (b. 1881) |
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rem koolhaas Dutch architect (b.1944), NL (b. 1944) |
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| antonie aart koolhaas NL (b. 1916) |
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| teun koolhaas Dutch architect (1940-2007), NL (b. 1940) |
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nicole koolhaas Dutch volleyball player, NL (b. 1991) |
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| thomas koolhaas Dutch illustrator, NL (b. 1946) |
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| jacob marinus koolhaas (b. 1948) |
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| marnix koolhaas Dutch radio host and program maker, NL (b. 1960) |
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| betje koolhaas Dutch actress, NL (b. 1972) |
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| jan koolhaas Est 1668 - 30 May 1707 Deventer |
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| jacobus koolhaas Dutch architect |
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| tomas koolhaas director and filmmaker |
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| hermanna koolhaas Est 1736 - 3 Dec 1807 Deventer |
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