Surname Barnhoorn (Barnhoorn 
) , in the world, is quite a rare last name. The cognomen Barnhoorn is characteristic of Netherlands, where it is quite a rare surname, Mauritius, and Ethiopia, where it is a rare surname. Not in comparison with a country's population, the name is most common in Netherlands, Ethiopia, and South Africa.
| VARIANT | COUNTRY |
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| Barnhoorn | Australia, South Africa, United States, Netherlands, Ethiopia |
| mariëtte barnhoorn NL (b. 1953) |
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| frank barnhoorn Dutch photographer, NL (b. 1968) |
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| auke barnhoorn researcher, ORCID id # 0000-0002-3074-5535 |
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| siddhartha barnhoorn NL (b. 1970) |
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| irene barnhoorn researcher (ORCID 0000-0002-6635-304X) |
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| pieter c barnhoorn researcher |
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| anne barnhoorn Dutch screenwriter, NL (b. 1982) |
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