Cognomen Heidorn (Heidorn 
) , across the world, is quite a rare surname. The last name Heidorn is habitual in Germany, where it is quite a rare surname, the United States, where it is a rare surname, and Ireland. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Brazil.
| VARIANT | COUNTRY |
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| Heidorn | Germany, Australia, Brazil, United States, Sweden |
| peter heidorn (b. 1650) |
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| carl adolph ferdinand heidorn German pewterer (1823-1893), DE (b. 1823) |
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| dietrich heidorn (b. 1833) |
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| max heidorn DE (b. 1875) |
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| fritz heidorn DE (b. 1899) |
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| günter heidorn German politician and historian of modern age (1925-2010), DE (b. 1925) |
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robert heidorn German poker player, DE (b. 1988) |
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| hartwig heidorn DE (b. 1931) |
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| edgar heidorn German rower, DE (b. 1941) |
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| joachim heidorn German diplomat, DE (b. 1951) |
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| mike heidorn American rock drummer, US (b. 1967) |
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| ute heidorn DE (b. 1962) |
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| william dale heidorn particle physicist |
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| p. bryan heidorn informaticist |
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| frederic heidorn German actor, DE (b. 1985) |
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