Family name Olthof (Olthof 
) , all around the world, is quite a rare surname. The family name Olthof is habitual in Netherlands, where it is quite a common surname, Belgium, where it is a rare surname, and Portugal. Not in comparison with a country's population, the name is most common in Netherlands, the United States, and Germany.
| VARIANT | COUNTRY |
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| Olthof | Australia, Germany, Canada, United States, Netherlands |
| statius olthof (b. 1555) |
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| johann olthof (b. 1555) |
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| johann olthof (b. 1595) |
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adolf friedrich von olthof politician (1718-1793), DE (b. 1718) |
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| alje olthof Dutch graphic designer (1935-1995), NL (b. 1935) |
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| albert olthof jewelry designer (b. 1939) |
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| jeroen olthof Dutch politician, NL (b. 1968) |
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| marleen i a olthof researcher |
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| gabriël olthof Dutch carcinologist |
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| merlijn olthof researcher (ORCID 0000-0002-5975-6588) |
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| hindericus olthof Ph.D. Rijksuniversiteit Groningen 1975 |
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| ijsbrand olthof politician from the Netherlands, NL |
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| susann-cathrin olthof researcher |
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| pim b olthof researcher ORCID ID = 0000-0002-1691-1808 |
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| margreet r olthof researcher (ORCID 0000-0002-1982-9244) |
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