Last name Trenn (Trenn 
) , worldwide, is a rare family name. The family name Trenn is habitual in Germany, where it is a rare surname, Canada, where it is a very rare surname, and the United States. Much less frequently, Trenn is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Trenn | Canada, United Kingdom, China, United States, Germany |
| otto oscar albert trenn DE (b. 1851) |
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| rudolf trenn German officer and Knight's Cross recipient, DE (b. 1917) |
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| olaf trenn DE (b. 1963) |
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| stephan trenn Dr. rer. nat. Technische Universität Ilmenau 2009 |
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| susanne trenn |
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| concetta trenn |
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Mr, Anita, Aidan, Aaron, Chris, Corey, Berta, Bryah, Karen, Kelly, Kevin, Klaus, Peter, Peggy, Debby, Danny, David, Diana, Diane, Laura, Linda, Jason, Anton, Angel, Sarah, Maria, Ed, Kay, Don, Lea, Jan, Joy, Tom, Ida, Udo, Mary, Josie, Mark, Cody, Paul, Ruth, Ryan, Lisa, Lois, John, Jean, Nico, Inez, Sara, and Julia