Cognomen Knuth (Knuth 
, Кнут 
) , all around the world, is quite a common family name. The surname Knuth is habitual in Germany, where it is quite a rare surname, Denmark, and Uruguay. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Brazil. Very seldom, Knuth is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Knuth | Germany, Denmark, United States, Poland, Brazil |
| Кнут | Belarus, Russia, Ukraine |
| moritz von knuth (b. 1500) |
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| joachim von knuth (b. 1500) |
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| adam von knuth DE (b. 1505) |
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| jacob von knuth (b. 1550) |
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eckhard christoph von knuth German-Danish noble, landowner and civil servant, DE (b. 1643) |
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| elisabeth knuth (b. 1598) |
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| jacob ernst von knuth (1609-1675) (b. 1609) |
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adam christopher knuth til knuthenborg empiro is the universe watching out for you, DK (b. 1687) |
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| joachim friedrich von knuth DE (b. 1642) |
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| adam levin knuth DE (b. 1648) |
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| anne christine von knuth DK (b. 1678) |
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| adam levin i. von knuth (b. 1681) |
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constantia alexandra von knuth, gräfin knuth-knuthenborg Saxonian-Danish noble woman, DE (b. 1756) |
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johan heinrich knuth DK (b. 1746) |
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frederik knuth (1760-1818), DK (b. 1760) |
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