Cognomen Siepen (Siepen 
) , all over the world, is a rare surname. The family name Siepen is habitual in Germany, where it is a rare surname, Australia, and Sweden.
| VARIANT | COUNTRY |
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| Siepen | United Kingdom, Germany, Australia, Sweden, France |
| ägidius siepen (b. 1635) |
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adam siepen German painter (1851-1904), DE (b. 1851) |
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| bernhard siepen DE (b. 1885) |
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peter siepen Swedish television presenter, SE (b. 1962) |
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marcus siepen German guitarist, DE (b. 1968) |
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| dieter aus dem siepen German politician (1922-1982), DE (b. 1922) |
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| karl siepen DE (b. 1923) |
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| karin aus dem siepen badminton player, DE (b. 1943) |
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| stefan aus dem siepen German diplomat, writer and jurist, DE (b. 1964) |
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| margareta siepen (b. 1959) |
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| jennifer anne siepen researcher |
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| fabian aus dem siepen researcher |
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| malte siepen |
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| grete siepen |
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| nicolas siepen |
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Mr, Bernd, Karin, Karen, Klaus, Peter, René, David, Donna, Louis, Josef, Jutta, Jörg, Tanja, Franz, Willi, Markus, Mirtes, Sabine, Sascha, Stefan, Sylvia, Chris, Achim, Amira, Alana, Ms, Kim, Dan, Jã, Marc, Mark, Samy, Sven, Alex, Paul, Andrea, Ralf, Toni, Tina, Elke, Wolf, Maria, Marec, Megan, Mirko, Mirja, Sarah, Dirk, and Ariane