Surname Cleiren (Cleiren 
) , across the world, is a rare last name. The cognomen Cleiren is characteristic of Belgium, where it is quite a rare surname, Netherlands, where it is a rare surname, and Canada, where it is a very rare surname. Very seldom, Cleiren is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Cleiren | Belgium, Netherlands, France, Canada, Germany |
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robbie cleiren Belgian actor, BE (b. 1971) |
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| liliane cleiren cyclist, BE (b. 1942) |
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| tineke cleiren university teacher at Leiden University, NL (b. 1955) |
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| cleiren mp researcher |
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| julia cleiren Righteous Among the Nations, BE |
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| chris cleiren BE |
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| stefaan cleiren |
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