Cognomen Trefzger (Trefzger 
) , in the entire world, is a rare surname. The surname Trefzger is characteristic of Western Europe, particularly Switzerland, where it is quite a rare surname, Germany, where it is a rare surname, and Austria. Not in comparison with a country's population, it is commonest in Germany, the United States, and Switzerland. Very seldom, Trefzger is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Trefzger | Germany, Austria, Switzerland, United States, Brazil |
| erwin f... trefzger (b. 1900) |
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| detlef trefzger German business executive, DE (b. 1962) |
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| thomas trefzger researcher |
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| joseph w. trefzger Ph.D. University of Illinois at Urbana-Champaign 1993 |
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Mr, Dair, Dirk, Gigi, Lori, Lynn, Jack, John, Tara, Tori, Dave, Neil, Erik, Enno, Emil, Hans, Ilda, Sarah, Shona, Silke, Susan, Eric, Rick, Paul, Kyle, Ms, Ed, Don, Lee, Jon, Joe, Tom, Tim, Ian, Mark, Mike, Sara, Alex, Alan, Anna, Aida, Cole, Barb, Beth, Kate, Kurt, Suzie, and Sonia