Last name Claus (Claus 
, كلاوس 
, Клаус 
, among others...) , in the world, is a common family name. The surname Claus is habitual in Western Europe, particularly Belgium, where it is quite a common surname, Germany, and Luxembourg, where it is quite a rare surname. In absolute terms, this name is the most popular in Germany, the United States, and Belgium. More prevalently, Claus is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Claus | Belgium, France, United States, Denmark, Germany |
| كلاوس | Iraq |
| Клаус | Kazakhstan, Russia, Tajikistan, Belarus, Ukraine |
| קלאוס | Israel |
| كلوز | Iraq, Egypt |
| クラウス | Japan |
| katharina claus (b. 1568) |
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| jan claus Dutch Quaker leader (b. 1641) |
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daniel claus American Indian agent, DE (b. 1727) |
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| anton claus born 1691; died 1754 (b. 1691) |
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| joseph ignatz claus German author, DE (b. 1691) |
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| johann theodor claus (1700-1777) (b. 1700) |
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| johann ernst claus (b. 1696) |
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| franciscus claus (b. 1706) |
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| michael ludwig claus German painter (1724-1773), PL (b. 1724) |
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| christian heinrich claus (b. 1722) |
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| julian eberhard volkmar claus (b. 1725) |
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| johann andreas claus (b. 1731) |
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karl ernst claus Baltic German scientist, SE (b. 1796) |
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| christian konrad claus (b. 1740) |
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| ann claus (b. 1745) |
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