Surname Hardegen (Hardegen 
) , all around the world, is a rare cognomen. The family name Hardegen is habitual in Germany, where it is a rare surname, Switzerland, where it is a very rare surname, and Australia. Not in comparison with a country's population, it is commonest in Germany, the United States, and Australia. Much less frequently, Hardegen is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Hardegen | Switzerland, Australia, United States, Thailand, Germany |
| hardeg hardegen (b. 1565) |
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| catharina hardegen (b. 1595) |
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| johann christian hardegen (b. 1766) |
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| johann conrad hardegen Born 31 December 1819, in Bremen; died 3 November 1883, in Bremen. German, Lithographer., DE (b. 1819) |
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reinhard hardegen German World War II U-boat commander (1913-2018), DE (b. 1913) |
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| richard hardegen DE (b. 1933) |
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| lucia maria hardegen German artist, DE (b. 1951) |
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| dirk hardegen German voice actor, DE (b. 1969) |
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| kathryn hardegen Australian chess player, AU (b. 1983) |
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| madita hardegen |
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| annie hardegen |
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Mr, Katie, Paige, Peggy, Randy, Roger, Devin, Diana, Laura, James, Jason, Joyce, Jenny, Nancy, Erich, Erwin, Marius, Martin, Martha, Markus, Monica, Steven, Karen, Cheryl, Bryan, Alina, Sue, Kai, Kim, Jen, Mary, Mark, Sara, Anna, Adam, Karl, Dale, Dirk, Gisa, Lisa, John, Jens, Nick, Neil, Sarah, Shawn, Susan, Brian, and Carrie