Surname Knotek (Knotek 
) , all over the world, is quite a rare last name. The cognomen Knotek is habitual in Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Austria. In absolute terms, this name is the most popular in Czechia, Slovakia, and the United States. Much less frequently, Knotek is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Knotek | Poland, United States, Austria, Slovakia, Czechia |
| františek knotek CZ (b. 1849) |
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| ida knotek holocaust victim, b. 1873-02-01, AT (b. 1873) |
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| rudolf knotek holocaust victim, b. 1873-09-16, AT (b. 1873) |
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| bohumil knotek holocaust victim, b. 1875-05-05, CZ (b. 1875) |
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| emil knotek holocaust victim, b. 1875-06-06, CZ (b. 1875) |
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| oskar knotek holocaust victim, b. 1882-06-24, CZ (b. 1882) |
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| václav knotek Czech politician, publicist and union member, CZ (b. 1889) |
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| ladislav knotek (b. 1892) |
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| anatol knotek AT (b. 1897) |
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| josef knotek (b. 1899) |
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| robert knotek (b. 1900) |
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| jaroslav knotek CZ (b. 1901) |
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| rudolf knotek CZ (b. 1901) |
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| jaroslav knotek Czechoslovakian hammer and discus thrower, CZ (b. 1912) |
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| zdeněk knotek (b. 1903) |
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