Last name Oosthuysen (Oosthuysen 
) , globally, is quite a rare surname. The family name Oosthuysen is habitual in Namibia, where it is quite a rare surname, South Africa, and Qatar, where it is a rare surname. Measured by absolute frequency, this name is the most popular in South Africa, Namibia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Oosthuysen | Australia, Namibia, United States, United Kingdom, South Africa |
| deon oosthuysen South African rugby union footballer, ZA (b. 1963) |
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| willem oosthuysen researcher (ORCID 0000-0002-2834-7095) |
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| anel oosthuysen researcher |
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| wilhelm f oosthuysen researcher ORCID ID = 0000-0003-4663-014X |
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| samantha oosthuysen South African cyclist, ZA (b. 1984) |
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