Cognomen Osthoff (Osthoff 
) , worldwide, is quite a rare surname. The surname Osthoff is habitual in Germany, where it is quite a rare surname, Austria, where it is a rare surname, and Hungary. Measured by absolute frequency, the name is most common in Germany, the United States, and Indonesia. Very seldom, Osthoff is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Osthoff | Hungary, United States, Austria, Germany, Indonesia |
| johanna osthoff (1780-1809) (b. 1780) |
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hermann osthoff German linguist (1847-1909), DE (b. 1847) |
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oscar osthoff American sportsperson, US (b. 1883) |
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| franz heinrich osthoff (b. 1829) |
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| georg osthoff (b. 1844) |
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| georg osthoff DE (b. 1844) |
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| carl osthoff (b. 1853) |
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| heinrich osthoff (b. 1856) |
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| hans osthoff (b. 1857) |
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| heinrich osthoff DE (b. 1857) |
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| hermann osthoff German painter (1879-1918), DE (b. 1879) |
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| helmuth osthoff German composer, DE (b. 1896) |
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| hermann osthoff (b. 1892) |
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| otto osthoff German actor (1906-1957), DE (b. 1906) |
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| hans-werner osthoff German university teacher (1911-2006), DE (b. 1911) |
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