Cognomen Oorthuys (Oorthuys 
) , all around the world, is a very rare last name. The cognomen Oorthuys is habitual in Netherlands, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Oorthuys | United States, Netherlands |
| gerardus oorthuys (b. 1742) |
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cas oorthuys Dutch photographer, NL (b. 1908) |
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| gerardus oorthuys born 1876; died 1959 (b. 1876) |
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| gerrit oorthuys (b. 1933) |
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| fenna oorthuys (b. 1944) |
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| jeldrik oorthuys collector of art and contemporary jewellery |
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| hansje oorthuys |
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| g. oorthuys |
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| frank oorthuys |
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