Family name Herdan (Herdan 
) , in the entire world, is a rare surname. The last name Herdan is habitual in Czechia, where it is a rare surname, Germany, and Egypt. Measured by absolute frequency, it is the most numerous in Germany, Egypt, and the United States. Likewise, Herdan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Herdan | Germany, Egypt, United States, Indonesia, Democratic Republic of the Congo |
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klara herdan Austrian stage actress, AT (b. 1873) |
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| vítězslav herdan holocaust victim, b. 1894-01-26, CZ (b. 1894) |
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| gustav herdan German jurist and linguist (1897-1968), DE (b. 1897) |
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| richard herdan engineer, official (1900-1966), CZ (b. 1900) |
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| alice herdan-zuckmayer German writer (1901-1991), DE (b. 1901) |
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| johanna herdan CZ (b. 1909) |
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| marion herdan German politician, DE (b. 1958) |
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| ragaa herdan researcher (ORCID 0000-0001-9782-5284) |
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