Surname Withaar (Withaar 
) , around the world, is a rare cognomen. The surname Withaar is characteristic of Netherlands, where it is quite a rare surname, Norway, where it is a very rare surname, and New Zealand. In absolute terms, it is commonest in Netherlands, Germany, and the United States.
| VARIANT | COUNTRY |
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| Withaar | Germany, Australia, United States, Brazil, Netherlands |
| j. withaar badminton player, NL (b. 1900) |
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| reint withaar Dutch painter, NL (b. 1928) |
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| gerrit withaar Dutch entomologist, NL (b. 1940) |
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| frederiec kunna withaar (b. 1968) |
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