Cognomen Trosch (Trosch 
) , throughout the world, is quite a rare last name. The family name Trosch is habitual in Switzerland, where it is quite a common surname, Argentina, where it is a rare surname, and Germany.
| VARIANT | COUNTRY |
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| Trosch | Argentina, Germany, France, United States, Switzerland |
| johannes trosch (1767-1824), CH (b. 1767) |
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| david trosch American priest, US (b. 1935) |
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| wilbur trosch American basketball coach and basketball player, US (b. 1938) |
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| gene trosch American football player, US (b. 1945) |
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| thomas trosch American painter (b. 1955) |
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| glen trosch American memorabilia businessman (b. 1963) |
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| tom trosch college basketball player (1963–1966) Saint Francis (PA) |
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Mr, Lori, Loni, Luis, Jana, Jose, John, Joel, Jesi, Juan, Lisa, Judy, Elsa, Elva, Edit, Eric, Erik, Hugo, Ines, Olga, Omar, Nora, Leah, Glen, Dora, Ms, Al, Sol, Ana, Kay, Dan, Don, Lou, Ema, Mary, Mark, Sara, Alma, Anne, Abel, Avel, Carl, Bill, Kate, Rick, Ryan, Maria, and Marta