Cognomen Westerkamp (Westerkamp 
) , in the world, is quite a rare surname. The family name Westerkamp is characteristic of Netherlands, where it is quite a rare surname, Germany, and Denmark, where it is a rare surname. Measured by absolute frequency, it is commonest in Germany, Netherlands, and the United States.
| VARIANT | COUNTRY |
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| Westerkamp | Netherlands, Brazil, Indonesia, United States, Germany |
| karl westerkamp German politician (1837-1901), DE (b. 1837) |
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| j. b. westerkamp DE (b. 1839) |
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| siegfried westerkamp DE (b. 1874) |
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| alix westerkamp DE (b. 1876) |
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| eberhard westerkamp German jurist and lawyer, DE (b. 1903) |
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| max westerkamp field hockey player, NL (b. 1912) |
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| elizabeth westerkamp Argentine pianist (1914-2017), AR (b. 1914) |
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| josé federico westerkamp Argentine physicist, AR (b. 1918) |
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| hildegard westerkamp German-Canadian composer, DE (b. 1946) |
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| ron westerkamp NL (b. 1942) |
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| bill westerkamp college basketball player (1961–1963) Dayton |
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| werner westerkamp Dr. rer. nat. Universität Bielefeld 1995 |
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| dirk westerkamp DE (b. 1971) |
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| ulrich westerkamp |
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| marilyn j. westerkamp |
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