Family name Klocksin (Klocksin 
) , around the globe, is a very rare cognomen. The last name Klocksin is characteristic of Germany, where it is a very rare surname, the United States, where it is an extremely rare surname, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Klocksin | Brazil, United States, Germany |
| jürgen klocksin German politician, DE (b. 1932) |
|
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| jens klocksin German politician, DE (b. 1957) |
|