Last name Ostendorf (Ostendorf 
, Остендорф 
) , all over the world, is quite a common cognomen. The cognomen Ostendorf is habitual in Western Europe, particularly Germany, where it is quite a rare surname, Austria, and Netherlands. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Netherlands.
| VARIANT | COUNTRY |
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| Ostendorf | United States, Netherlands, Austria, Germany, Canada |
| Остендорф | Ukraine |
| johann franz von raesfeld zu ostendorf (b. 1650) |
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| franz arnold von raesfeld zu ostendorf (b. 1709) |
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julius ostendorf German politician and educationist (1823-1877), DE (b. 1823) |
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friedrich ostendorf German architect (1871-1915), DE (b. 1871) |
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| gottfried friedrich ostendorf (b. 1823) |
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lloyd ostendorf (b. 1921) |
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| johannes ostendorf DE (b. 1876) |
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| fred ostendorf American baseball player, US (b. 1892) |
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josef ostendorf German actor, DE (b. 1956) |
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| edith ostendorf DE (b. 1911) |
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| hans ostendorf DE (b. 1924) |
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| jens-peter ostendorf German composer, DE (b. 1944) |
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| heribert ostendorf German judge and university teacher, DE (b. 1945) |
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| peter c. ostendorf (b. 1939) |
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hannes ostendorf |
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