Family name Treich (Treich 
) , in the world, is a rare last name. The surname Treich is habitual in France, where it is a rare surname, the United States, where it is a very rare surname, and Israel. In absolute terms, it is the most numerous in the United States, France, and Brazil. More prevalently, Treich is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Treich | Canada, France, United States, Brazil, Democratic Republic of the Congo |
|
marcel treich-laplène French colonial governor, FR (b. 1860) |
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| léon treich French writer and screenwriter (1889-1974), FR (b. 1889) |
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| nicolas treich economist (Toulouse School of Economics (TSE)) |
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| gregory m treich researcher |
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