Cognomen Trösch (Troesch 
, Trösch 
) , in all the world, is quite a rare surname. The last name Trösch is habitual in Western Europe, particularly Switzerland, where it is quite a rare surname, Luxembourg, and France. In absolute terms, it most frequently occurs in France, Germany, and the United States. Much less frequently, Trösch is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Troesch | Austria, France, Germany, United States, Switzerland |
| Trösch | Luxembourg, Germany, Turkey, United States, Switzerland |
| joseph trösch (1769-1807), CH (b. 1769) |
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| ferdinand trösch Ferdinand Trösch (1839-1896), AT (b. 1839) |
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robert trösch Swiss actor (1911-1986), CH (b. 1911) |
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| walter trösch Swiss publisher (1875-1959), CH (b. 1875) |
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| ernst trösch CH (b. 1879) |
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| rainer trösch (b. 1957) |
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| miléna trösch researcher |
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| jürgen trösch DE (b. 1970) |
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| josua trösch researcher ORCID ID = 0000-0002-7770-7333 |
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| raphael trösch researcher, ORCID id # 0000-0002-0632-3324 |
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| ursula trösch CH |
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| rebecca trösch CH (b. 1980) |
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| jan trösch CH (b. 1980) |
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| ferdinand trösch |
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| sarah trösch Swiss volleyball player (b. 1994) |
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Jan, Peter, Ramon, Robin, Roger, René, Ruedi, David, Laura, Jarno, Josua, Joana, Jürg, Tanja, Haiko, Heinz, Horst, Franz, Fritz, Irene, Otmar, Martin, Kevin, Bruno, Beate, Benno, Urs, Marc, Mark, Mike, Beat, Karl, Kurt, Rolf, Reto, Ruth, Markus, Lara, Jens, Hans, Finn, Olga, Ueli, Mario, Marco, Sarah, Steve, Armin, Lisa, and Manuel