Cognomen Krach (Crack 
, Krah 
, Krach 
) , around the world, is a common last name. The cognomen Krach is habitual in Ghana, where it is quite a common surname, Liberia, where it is quite a rare surname, and Germany. Not in comparison with a country's population, the name is most common in Germany, Ghana, and Ivory Coast. Much less frequently, Krach is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Crack | Ghana, United Kingdom, United States, Germany, Indonesia |
| Krah | Ivory Coast, Ghana, United Kingdom, United States, Germany |
| Krach | United Kingdom, United States, Germany, Poland, Algeria |
| Crah | Spain, Nigeria, United States, Germany |
| robert krach Prague-based tailor and textile producer, also in Vienna and Istanbul, CZ (b. 1818) |
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| martin johannes krach (b. 1843) |
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| joseph krach (b. 1844) |
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| salomon krach biologist (1902-1941), UA (b. 1902) |
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keith j. krach American business executive and politician, US (b. 1957) |
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aaron krach American film critic, journalist, writer and artist, US (b. 1972) |
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| egon krach (b. 1914) |
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steffen krach politician, DE (b. 1979) |
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| fritz krach DE (b. 1924) |
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| linda krach researcher |
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| brigitte krach botanist |
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| pilocka krach DE (b. 1970) |
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| sören krach researcher |
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| s kathleen krach researcher |
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| martin krach |
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