Last name Grethen (Grethen 
) , all over the world, is a rare cognomen. The surname Grethen is characteristic of Western Europe, particularly Luxembourg, where it is quite a common surname, France, where it is a rare surname, and Germany. Much less frequently, Grethen is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Grethen | Germany, United States, Philippines, France, Luxembourg |
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henri grethen Luxembourgian politician, LU (b. 1950) |
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| edouard grethen (1903-1981), LU (b. 1903) |
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fonsy grethen Luxembourgian billiards player, LU (b. 1960) |
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luc grethen Luxembourgian composer, LU (b. 1964) |
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charles grethen Luxembourgian male middle-distance runner, LU (b. 1992) |
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| philippe grethen French politician, FR (b. 1956) |
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| rachel grethen researcher |
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| anne grethen Luxembourgian female volleyball & beach volleyball player, LU (b. 1987) |
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| gilles grethen musician (b. 1994) |
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Mr, Lisa, Jann, John, Jean, Nico, Nora, Elia, Eric, Hugo, Inge, Maria, Marie, Marin, Mario, Marco, Marga, Mirko, Serge, Sonja, Steve, Alain, Lily, Chris, Gina, Dana, Ms, Ben, Kim, Pat, Pam, Dan, Luc, Tom, Ian, Marc, Mary, Mark, Mike, Sean, Alex, Andy, Anna, Anne, Chad, Paul, Ruby, Dion, and Carol