Last name Blech (Blacha 
, Blech 
, Pleh 
) , around the world, is quite a common family name. The cognomen Blech is characteristic of Bosnia and Herzegovina, where it is quite a rare surname, Germany, and Poland. Not in comparison with a country's population, the name is most common in Germany, Poland, and the United States. Likewise, Blech is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Blacha | Poland, France, Israel, United States, Germany |
| Blech | Poland, France, United States, Democratic Republic of the Congo, Germany |
| Pleh | Bosnia and Herzegovina, Myanmar, United States, Germany, Croatia |
| Блех | Belarus, Kazakhstan, Russia, Ukraine |
| ephraim philipp blech DE (b. 1757) |
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| abraham friedrich blech PL (b. 1762) |
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gustavus m. blech physician, surgeon, medical educator, US (b. 1870) |
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leo blech German opera composer and conductor, DE (b. 1871) |
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| karl blech PL (b. 1826) |
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| ernst blech DE (b. 1846) |
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| edward blech British diplomat and librarian (1861-1919) (b. 1861) |
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| aimée blech French theosophist (1862-1930), FR (b. 1862) |
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hans christian blech German actor (1915-1993), DE (b. 1915) |
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| lila blech holocaust victim, b. 1867-01-01, DE (b. 1867) |
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| charles blech (b. 1882) |
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| jakub blech holocaust victim, b. 1898-04-15, CZ (b. 1898) |
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| rené blech (b. 1900) |
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| harry blech British conductor and musician, GB (b. 1910) |
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| wolfgang blech CZ (b. 1904) |
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