Family name Treusch (Treusch 
) , around the world, is a rare last name. The cognomen Treusch is characteristic of Austria, where it is quite a rare surname, Germany, where it is a rare surname, and Canada, where it is a very rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and Austria. Much less frequently, Treusch is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Treusch | Spain, Canada, Austria, United States, Germany |
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joachim treusch German physicist, DE (b. 1940) |
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| hermann treusch German actor, DE (b. 1937) |
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| martina treusch German film director, screenwriter and film producer, DE (b. 1972) |
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| gertrud von buttlar gen. treusch Abt 1570 - 1617 |
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| rolf treusch researcher |
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| christl treusch film editor |
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| alexander h. treusch researcher |
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| klara treusch researcher |
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| wilhelm treusch |
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| katharina von buttlar genannt treusch |
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| dorothea von buttlar genannt treusch |
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