Surname Klock (Klock 
) , worldwide, is quite a common last name. The surname Klock is characteristic of Norway, where it is quite a rare surname, Hungary, and Germany, where it is a rare surname. Measured by absolute frequency, it is the most numerous in the United States, Brazil, and Germany.
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| Klock | Norway, Brazil, France, United States, Germany |
| johannes jakob karl klock (1723-1798) (b. 1723) |
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| jacob george klock American politician, US (b. 1738) |
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| jacob klock American militiaman (b. 1738) |
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james klock Canadian politician, CA (b. 1856) |
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| frances s. klock American politician (1844-1908), US (b. 1844) |
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| neil haven klock Louisiana state representative and sugar planter, US (b. 1896) |
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| joseph klock French politician, FR (b. 1908) |
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| louis klock FR (b. 1903) |
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| horst-dieter klock German theater scholar, film production manager and children's book author, DE (b. 1935) |
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| franz-joachim klock (1937-2000) (b. 1937) |
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| walter klock DE (b. 1930) |
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| harry klock Member of the Montana House of Representatives, US (b. 1948) |
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| lynn klock American musician, US (b. 1950) |
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| françois klock French politician, FR (b. 1955) |
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| christoph klock (b. 1954) |
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