Cognomen Kamstra (Kamstra 
) , in the entire world, is quite a rare last name. The last name Kamstra is habitual in Netherlands, where it is quite a rare surname, New Zealand, where it is a rare surname, and Canada. In absolute terms, it is the most numerous in Netherlands, the United States, and Canada.
| VARIANT | COUNTRY |
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| Kamstra | Netherlands, United States, Australia, South Africa, Canada |
| klaaske kamstra Dutch Righteous Among the Nations, NL (b. 1889) |
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| sijbolt kamstra NL (b. 1885) |
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| joop kamstra Dutch sportsperson and athletics competitor (1905-1957), NL (b. 1905) |
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| jacques kamstra university teacher (1926-2008), NL (b. 1926) |
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| cor kamstra chess player (b. 1958) |
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| alex kamstra Dutch football player, NL (b. 1959) |
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| hans kamstra NL (b. 1956) |
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| petra kamstra Dutch tennis player, NL (b. 1974) |
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| tirtsa kamstra politician from the Netherlands, NL (b. 1976) |
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| jorke h kamstra researcher ORCID ID = 0000-0001-7984-0229 |
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| marjan kamstra Dutch diplomat |
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| rhiannon l kamstra researcher |
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| chad kamstra college basketball player (1997–2000) Toledo |
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| mark jack kamstra Ph.D. University of California, San Diego 1992 |
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| john kamstra college basketball player (1973–1975) Indiana |
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