Surname Koolhof (Koolhof 
) , all over the world, is a rare cognomen. The surname Koolhof is habitual in Netherlands, where it is quite a rare surname, Ireland, where it is a rare surname, and Austria. Not in comparison with a country's population, this name is the most popular in Netherlands, Germany, and the United States.
| VARIANT | COUNTRY |
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| Koolhof | Netherlands, United States, Austria, Australia, Germany |
| gezienus koolhof Dutch architect, NL (b. 1885) |
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jurrie koolhof Dutch footballer and manager (1960-2019), NL (b. 1960) |
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| jan koolhof NL (b. 1922) |
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wesley koolhof Dutch tennis player, NL (b. 1989) |
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| iain koolhof researcher |
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| g. koolhof |
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| corline koolhof |
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| dean koolhof Dutch footballer, NL (b. 1994) |
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