Family name Semrau (Semrau 
) , worldwide, is quite a rare surname. The last name Semrau is habitual in Germany, where it is quite a rare surname, Poland, and the United States, where it is a rare surname. Very seldom, Semrau is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Semrau | Germany, Australia, United States, Poland, Canada |
| august semrau PL (b. 1816) |
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| józef semrau PL (b. 1833) |
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| max semrau German art historian, DE (b. 1859) |
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paul semrau German flying ace (1915-1945), PL (b. 1915) |
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| artur semrau (b. 1862) |
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| arthur semrau PL (b. 1862) |
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| franz semrau Romanist, DE (b. 1881) |
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| alfred semrau German politician (1882-1947), DE (b. 1882) |
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sue semrau women's basketball coach, US (b. 1962) |
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| eberhard semrau (b. 1906) |
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| henryk semrau (b. 1911) |
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björn semrau German politician, DE (b. 1978) |
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| elfriede semrau AT (b. 1922) |
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| richard semrau (b. 1924) |
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| eugen semrau (b. 1945) |
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