Surname Kootstra (Kootstra 
) , all around the world, is quite a rare cognomen. The last name Kootstra is characteristic of Netherlands, where it is quite a rare surname, New Zealand, where it is a rare surname, and Belgium. In absolute terms, it is the most numerous in Netherlands, the United States, and France.
| VARIANT | COUNTRY |
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| Kootstra | Germany, Canada, France, United States, Netherlands |
| gauke kootstra Dutch politician, NL (b. 1874) |
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| gauke kootstra NL (b. 1938) |
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| douwe kootstra Dutch writer, NL (b. 1951) |
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| keimpe kootstra NL (b. 1948) |
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| neeltje a kootstra researcher |
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| thomas j m kootstra researcher (ORCID 0000-0002-1994-4568) |
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| gerrit jan kootstra researcher |
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| gert kootstra Ph.D. Georg-August-Universität Göttingen 2010 |
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| britt kootstra FI (b. 1976) |
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| dianne kootstra NL (b. 1978) |
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